Abstract: The pivotal retaining device comprises; a pivotal portion having at least one first pivotal blocks at a distal end of a clamping portion and at least one second pivotal block at a front end of a handle portion; each first pivotal block having a respective first through hole. Each second pivotal block has a respective screw hole positioned corresponding to the through hole; each second pivotal block having a positioning hole which communicates into the screw hole; a pin inserting into the positioning hole; at least one retaining shaft; each retaining shaft inserting through the through hole and the positioning hole so as to fix the first pivotal block to the second pivotal block. Each retaining shaft has an insertion hole. The pin passing through the positioning hole further inserts through the insertion hole; thus the first pivotal block being firmly secured to the respective second pivotal block.

Abstract: A torque applying tool includes a handle and a function end which includes two jaws. A first resistive strain gauge and a second resistive strain gauge are respectively connected to two respective insides of the two jaws. A third resistive strain gauge is connected to the handle and electronically connected to the first and second resistive strain gauges. A display unit is connected to the handle and electronically connected to the third resistive strain gauge. The display unit displays the value of torque that is a result of calculation of information from the resistive strain gauges.

Abstract: A wire cutter includes two jaws pivotably connected with each other and each jaw has a curve cutting edge which includes a cutting portion which includes a first section, a second section and a third section which is located between the first and second sections. Each of the first section and the second section has a first side surface and a second side surface, and a first angle of 60 degrees is defined between the first side surface and the second side surface. The third section has a third side surface and a fourth side surface, a second angle of 35 degrees is defined between the third side surface and the fourth side surface. The wires are pushed toward the second sections and cut by the second sections.

Abstract: A tool handle device comprises a handle portion; a driving portion protruding from one end of the handle portion for driving a screwing elements. A maximum diameter portion having a size which cause the user can hold the tool handle device by the thumb, the index finger and a part of the hand between the thumb and the index finger; and a diameter of the maximum diameter portion is a maximum one of the handle portion. A portion of the handle portion from the maximum diameter portion to one end portion connected to the driving portion has a length between one fourth and one tenth of the length of the handle portion. Another end of the handle portion has a retaining portion for retaining a hand holding the handle portion.

Abstract: An adjustable wrench including a handle and a fixed jaw and a movable jaw disposed at one end of the handle. Two opposite sides of the two jaws respectively have a clamping face. At least two types of tooth regions are formed on the clamping face of at least one of the jaws. The tooth regions include a fine-tooth region composed of multiple fine teeth near inner end of the jaw and a coarse-tooth region composed of multiple coarse teeth near outer end of the jaw. When wrenching a small-size worn nut, the fine teeth of the fine-tooth regions of the jaws serve to clamp the nut. When wrenching a large-size worn nut, the coarse teeth of the coarse-tooth regions of the jaws serve to engage the nut.

Abstract: An enhancing structure of an electronic torsional tool having an electronic strain gauge for measuring a torsional force applied thereon; wherein the electronic torsional tool having a main body comprising: an extending rod mounted in the main body and extended through a longitudinal length of the main body, so as to enhance flexibility of the main body. The main body is provided with an opening to enhance flexibility of the main body. The extending rod is extended through a longitudinal length of the opening of the main body, so as to enhance the strength of the opening of the main body. The strain gauge is mounted in the opening of the main body.

Abstract: A screwdriver comprises a tip having a substantially I-shaped cross-section and comprising a first end formed with a first resting portion, a second end formed with a second resting portion, and a mediate section formed with an auxiliary resting portion located between the first resting portion and the second resting portion. A width between two larger sides of the auxiliary resting portion is 0.3 to 0.5 times of that of the first resting portion and that of the second resting portion. A length between two shorter sides of the auxiliary resting portion is 0.3 to 0.5 times of a length connected two shorter sides of the tip. The first resting portion and the second resting portion of the tip are bent and deformed when being subjected to a torque.

Abstract: An engaging device of a sleeve-form wrench comprises a spanner body and a sleeve. On an outer peripheral surface of the coupling shaft, a plurality of convex buckling portions and concave surface portions are arranged along an axial periphery of the coupling shaft; the convex buckling portions and concave surface portions have cambered shapes and are connected one by one; an inner wall of the sleeve is formed with concave arc portions with respect to the convex buckling portions and convex arc portions with respect to the concave surface portion so that the coupling shaft are inserted thereinto. By above structure the spanner body and the sleeve are combined tightly; moreover, the sleeve suffers a larger twisting force from the spanner body and the stress distributes uniformly.

Abstract: An anti-rolling socket. One end of the socket is formed with a fitting hole for fitting on a threaded member. An annular rib with a certain angle of arch is formed on a circumference of the socket to form a maximum outer diameter of the socket. In the case that the annular rib has a 360-degree arch, when the socket is placed on a plane, the annular rib and one end of the socket contact with the plane. When the socket rolls, the socket rolls about a circle. In the case that the annular rib has an arch that the angle of which is less than 360 degrees, when the socket rolls, the socket can only roll within a range less than one circle.

Abstract: Hand tool handle with rotary cap, including: a handle having a seat section at rear end; a rotary cap having a cavity and rotatably disposed on the seat section with the seat section accommodated in the cavity; and at least one projection having a cross-sectional area smaller than that of the rotary cap or the rear end of the handle. The projection is positioned between top wall of the cavity and an end face of the seat section. The top wall of the cavity via the projection contacts with the end face of the seat section. When the rotary cap rotates on the handle, the projection serves as a support point for the rotary cap so as to facilitate rotation of the rotary cap.

Abstract: A ratchet socket wrench has a main body, a shaft disposed on the main body, a drive device engaging with the shaft, and a sleeve engaging with the drive device. The drive device has a center hole, and a ratchet portion having a plurality of ratchets and an outer periphery groove. An elastic ring encloses the outer periphery groove of the drive device. A collar encloses the drive device. The sleeve has a corrugation hole, and a pawl portion having a plurality of pawls and an outer periphery recess. The pawls engage with the ratchets. The shaft is inserted in the center hole of the drive device. The collar has an inner annular flange. The drive device further has an annular recess to receive the inner annular flange of the collar.

Abstract: A hard tool handle with a rotary cap, comprises a handle; a seat section having a flat upper surface and protruded from a rear end of the handle; an integral formed rotary cap rotatably disposed at a rear end of the handle, an inner side of the rotary cap being formed with a cavity; the bottom of the rotary cap being a convex cambered surface so that the contact area between the inner bottom wall of the rotary cap and flat upper surface of the seat section being smaller than a cross-sectional area of the rotary cap or the rear end of the handle, and a gap being formed between the rotary cap and the seat section. When the rotary cap rotates on the handle, the seat section serves as a support point for the rotary cap.

Abstract: A hard tool handle with a rotary cap comprises a handle; a seat section having a flat upper surface and protruded from a rear end of the handle; an integral formed rotary cap rotatably disposed at a rear end of the handle, an inner side of the rotary cap being formed with a cavity; the bottom of the rotary cap being a flat surface; at least one pad with two flat opposite surfaces arranged between the flat upper surface of the seat section and the bottom of the rotary cap. The contact areas between the inner bottom wall of the rotary cap and at least pad and between the rear end of the handle and the at least one pad are smaller than a cross-sectional area of the rotary cap or the rear end of the handle, and a gap is formed between the rotary cap and the seat section. Then the rotary cap rotates on the handle, and the seat section serves as a support point for the rotary cap.

Abstract: Ratchet socket for fitting onto a screwed member. The ratchet socket is drivable by a tool to wrench the screwed member. The ratchet socket includes: a cylindrical main body formed with at least one internal circular hole and at least one through hole formed on the circumference of the main body and communicating with the circular hole; and a ratchet mechanism including a ratchet wheel rotatably disposed in the circular hole, a dog member movably accommodated in the through hole and a resilient hoop fitted around the main body to exert a resilient force onto the outer side of the dog member, keeping the dog member resiliently engaged with the ratchet wheel. When the dog member is engaged with the ratchet wheel, the ratchet mechanism provides a ratchet effect and the main body of the socket is one-way drivingly engaged with the ratchet wheel.

Abstract: A screwdriver structure includes a handle having a projecting section at rear end, a circumference of the projecting section being formed with a predetermined number of holes extending into the interior of the projecting section; a stem disposed at front end of the handle; and a rotary cap having a cavity inward extending from a bottom end of the rotary cap, an outer circumference of the rotary cap being formed with several through holes communicating with the cavity. The rotary cap is rotatably disposed on the projecting section which is accommodated in the cavity with the through holes. When operating the screwdriver, the palm of a user's hand can attach to the rotary cap. When turning the rotary cap, at least one through holes is align with at least one holes. A rod can be inserted through the hole and the through hole to elongate the application force arm.

Abstract: A wrench cooperating with a fastener, the fastener having a plurality of surfaces joint each other at respective corners of the fastener. The wrench comprises: driving cylindrical member including an enclosed opening formed therein and having six corner spaces and six sides provided therein, said six sides of said driving cylindrical member each including two cambered bulges formed and provided therein for engaging with the surfaces of the fastener, and a recess formed between said cambered bulges respectively.

Abstract: Ratchet socket for fitting onto a screwed member. The ratchet socket is drivable by a tool to wrench the screwed member. The ratchet socket includes: a cylindrical main body formed with at least one internal circular hole and at least one through hole formed on the circumference of the main body and communicating with the circular hole; and a ratchet mechanism including a ratchet wheel rotatably disposed in the circular hole, a dog member movably accommodated in the through hole and a resilient hoop fitted around the main body to exert a resilient force onto the outer side of the dog member, keeping the dog member resiliently engaged with the ratchet wheel. When the dog member is engaged with the ratchet wheel, the ratchet mechanism provides a ratchet effect and the main body of the socket is one-way drivingly engaged with the ratchet wheel.

Abstract: A ratchet socket wrench has a main body, a shaft disposed on the main body, a drive device engaging with the shaft, and a sleeve engaging with the drive device. The drive device has a center hole, and a ratchet portion having a plurality of ratchets and an outer periphery groove. An elastic ring encloses the outer periphery groove of the drive device. A collar encloses the drive device. The sleeve has a corrugation hole, and a pawl portion having a plurality of pawls and an outer periphery recess. The pawls engage with the ratchets. The shaft is inserted in the center hole of the drive device. The collar has an inner annular flange. The drive device further has an annular recess to receive the inner annular flange of the collar.