Abstract: A positioning member is used to position the movable jaw to the sliding groove of the adjustable wrench and the adjustable wrench together with the positioning member are applied by vibrate grinding technology so as to make the outer surface of the movable jaw to be a mirror surface and the rod of the movable jaw is kept as the surface condition after being machine. The tolerance between the rod and the sliding groove is controlled within expected range.

Abstract: An electric wrench with a control switch comprises a wrench body having a web area, on top of which includes a fixed jaw at one end and a movable jaw on the other end that can slide toward the fixed jaw along a slide slot. The web area further includes a first receptacle for housing a worm gear that is engaged with the movable jaw. The handle contains a second receptacle for housing a driving unit for driving the worm gear. The four lateral sides form a pair of grip sides for a holding hand and a pair of control panels on at least one of which control panels a button or rocker switch is provided, preventing accidental touch by the holding hand.

Abstract: An exhibition device for reversal spanners comprises a suspending plate having a buckling hole; a periphery of the buckling hole being formed with a notch so as to form as a confining unit; an inner side of the confining unit having a plurality of limiting teeth, and a seat; a connecting unit extending from the seat; the connecting unit being rotatably buckled to the buckling hole; a ratchet portion being formed on a surface of the connecting unit; the ratchet portion being not aligned to the notch; and the ratchet portion being engageable to the limiting teeth.

Abstract: A hand tool includes a handle having a connection end which includes two parallel arms and a driving member has an insertion which is pivotably connected between the two arms by a pin which extends through the two arms and the engaging notch of the insertion. The driving member can be easily replaced by disengaging the pin from the engaging recess of the driving member.

Abstract: A hand tool locking device for a hand tool includes a switch member having a shank which is rotatably inserted in a recess defined in the head of the hand tool and the shank includes a convex and curved surface and a flat surface. A pawl and a spring are received in a passage defined in an inside of the yoke of the head of the hand tool. The pawl has teeth defined in a first end thereof and the teeth are pushed to engage with engaging teeth of the pivotable tool head when the convex and curved surface of the shank pushes a second end of the pawl toward the tool head. When the shank is rotated to let the flat surface to contact the second end of the pawl, the teeth of the pawl are disengaged from the engaging teeth of the pivotable tool head.

Abstract: An adjustable spanner with electronic strain gauge function which comprises a head; an fixed jaw extending from the head; and sliding groove being transversally formed at one upper side of the head; a handle connected to a lower side of the head; at least one strain gauge; a hollow connecting tube having one end connected to the handle; the hollow connecting tube being installed with an output display device; a clamping surface of the moveable jaw and a clamping surface of the fixed jaw being formed as a working area for clamping a screw device; and a positioning portion being installed on the moveable jaw and at a non-working area below the working area; the position portion facing toward a clamping opening between the clamping surfaces of the moveable jaw and fixed jaw; and the positioning portion being capable of resisting against the screw device.

Abstract: A wrench includes a handle and an open-end with two jaws and each jaw has a driving surface. Each driving surface has a contacting area and two yielding areas. The contacting area is located between the two yielding areas and includes a contact portion and two notches. The contact portion is located between the two notches, and two extension areas each are connected between the yielding area and the notch corresponding thereto. A corner is formed at a joint area of the contact portion and an inside of the notch so as to bite a rounded fastener head. The contact portions are matched with straight sides of a normal fastener head.

Abstract: A wrench comprises a main body including a handle and a head including a fixed jaw and a groove and a passage which is located parallel to and communicates with the groove, a through hole defined through the head and communicating with the groove and the passage. A mediate member made of metal and integrally connected with the head by using injection, and including a protrusion, a tubular portion and a frame with an opening, the protrusion connected to the fixed jaw, the tubular portion engaged with the groove and the frame engaged with the through hole. A movable jaw made of metal and including a sliding rod slidably received in the tubular portion, a plurality of teeth defined in an underside of the sliding rod. An adjusting member made of metal and engaged with the opening of the frame, the adjusting member engaged with the teeth of the sliding rod.

Abstract: A method for making a wrench includes a step of making a mediate member, a movable jaw and an adjusting member, a step of applying heat treatment to the mediate member, the movable jaw and the adjusting member, a step of cleaning respective surfaces of the mediate member, the movable jaw and the adjusting member, and coating a anti-rusting layer on the mediate member, the movable jaw and the adjusting member, and a step of combination to put the mediate member in a mold and making a body by way of injection to integrally connect the mediate member to a head of the main body, the movable jaw and the adjusting member are installed to the body.

Abstract: A positioning member is used to position the movable jaw to the sliding groove of the adjustable wrench and the adjustable wrench together with the positioning member are applied by vibrate grinding technology so as to make the outer surface of the movable jaw to be a mirror surface and the rod of the movable jaw is kept as the surface condition after being machine. The tolerance between the rod and the sliding groove is controlled within expected range.

Abstract: A monkey wrench includes a handle, a head, stationary jaw, a movable jaw and a jaw-moving element. The head is formed at an end of the handle and made with a side, a groove in the side and an opening in communication with the groove. The stationary jaw is formed on the head and made with a first nut-contacting face, a second nut-contacting face next to the first nut-contacting face, a bulge on the first nut-contacting face and a recess next to the bulge. The movable jaw is movably disposed in the groove and formed with a nut-contacting face and a bulge on the nut-contacting face thereof. The jaw-moving element is disposed in the opening and engaged with the movable jaw so that the jaw-moving element is operable to move the movable jaw relative to the stationary jaw.

Abstract: A rotary wrench display bracket comprises a retaining frame composed of a swing arm and a U-shaped retaining plate. A pivotal portion is extended from the retaining frame, whereby the retaining frame will rotate about the pivotal portion through the swing arm. The retaining frame further includes an inner U-shaped flexible plate for retaining a wrench going into the retaining frame. Thereby, the wrench can be secured on the display bracket and can swing smoothly about a connecting mount it is confined.

Abstract: An open-end wrench having an open-end driving head and first and second jaw clips extending from two sides thereof. A maximum width W between outer edges of the two jaw clips is equal to 130 to 180% of a mouth width S between two opposite jaw end surfaces of the jaw clips. A distance from an inner corner at a junction between one of the jaw end surfaces and the connection end surface to an outer end surface of the jaw clip is defined as a stress region width T1. A length of a transversal phantom center line from one of the jaw end surfaces of the jaw clips to the outer edge of the jaw clip is defined as a jaw width T2 smaller than T1. Thus, the nut can be greatly wrenched in the limited space by limiting the ratio of W to S, and it is possible to prevent the structure from being broken.