Abstract: A folding hand saw includes a first housing, a transmission unit disposed in the first housing, a second housing having a third pivotal end pivotally connected with a second pivotal end of the first housing and connected with the transmission unit, and a saw blade having a forth pivotal end pivotally connected with a first pivotal end of the first housing and connected with the transmission unit such that the saw blade is pivotable between a folded position where the saw blade is inserted into a first insertion groove of the first housing and a second insertion groove of the second housing, and an unfolded position where the saw blade leaves the first insertion groove and the second insertion groove. As a result, the folding hand saw of the present invention can prevent the saw blade from hurting a user or other people.

Abstract: A hole saw includes an arbor, a saw blade assembly having a saw blade and an adapter connected with the saw blade and provided with a protrusion received in an indentation of the arbor, a lid movably mounted on a body portion of the arbor and movable relative to the arbor between a first position where second coupling portions of the adapter are blocked by a block portion of the lid and coupled to first coupling portions of the arbor such that the saw blade assembly can't be rotatable relative to the arbor, and a second position where the second coupling portions of the adapter are staggered with the block portion and uncoupled from the first coupling portions of the arbor through the rotation of the saw blade assembly. Thus, the hole saw has the advantages of reducing vibration in use and convenience in assembly and disassembly works.

Abstract: A handsaw for holding a saw blade for cutting is disclosed to include a handle having an cantilever bar, an extension bar pivoted to the cantilever bar and turnable relative to the handle between a received position and an extended position, a blade-retaining arm pivoted to one end of the extension bar remote from the handle and turnable about the axis of the extension bar, and two blade retaining members respectively provided at the handle and the blade-retaining arm for the mounting of a saw blade when the extension bar is turned to the extended position.

Abstract: A folding hand saw includes a first housing, a transmission unit disposed in the first housing, a second housing having a third pivotal end pivotally connected with a second pivotal end of the first housing and connected with the transmission unit, and a saw blade having a forth pivotal end pivotally connected with a first pivotal end of the first housing and connected with the transmission unit such that the saw blade is pivotable between a folded position where the saw blade is inserted into a first insertion groove of the first housing and a second insertion groove of the second housing, and an unfolded position where the saw blade leaves the first insertion groove and the second insertion groove. As a result, the folding hand saw of the present invention can prevent the saw blade from hurting a user or other people.

Abstract: A saw bow for a handsaw includes a saw bow body, a movable member movably mounted in a bottom of a handle of the saw bow body and movable relative to the handle along a longitudinal direction of the saw bow body, a bottom cover having a first pivotal portion pivotally connected with the handle of the saw bow body and a second pivotal portion, and a length-adjustable member having two ends respectively pivotally connected with a pivotal end of the movable member and the second pivotal portion of the bottom cover. As a result, the saw bow of the present invention can provide a congruous appearance and occupy less storage space.

Abstract: A hole saw includes an arbor, a saw blade assembly having a saw blade and an adapter connected with the saw blade and provided with a protrusion received in an indentation of the arbor, a lid movably mounted on a body portion of the arbor and movable relative to the arbor between a first position where second coupling portions of the adapter are blocked by a block portion of the lid and coupled to first coupling portions of the arbor such that the saw blade assembly can't be rotatable relative to the arbor, and a second position where the second coupling portions of the adapter are staggered with the block portion and uncoupled from the first coupling portions of the arbor through the rotation of the saw blade assembly. Thus, the hole saw has the advantages of reducing vibration in use and convenience in assembly and disassembly works.

Abstract: A door lockset mounting tool includes a base body, which has a first plate member and a second plate member fixedly arranged at right angles, a first positioning hole defined in the first plate member, and a second positioning hole defined in the second plate member, a positioning mechanism, which is movably mounted in the first positioning hole of the base body for defining a first drilling center, and a positioning device, which is mounted in the second positioning hole for defining a second drilling center.

Abstract: A hole saw includes a shaft, a hole-cutter and an adjustable outer cutter unit. The shaft has a bottom coupling hole for receiving a pilot drill, a top coupling rod for fastening to a driving tool, and an outer thread extending around the periphery thereof. The hole-cutter has a top center inner thread threaded onto the outer thread of the shaft. The adjustable outer cutter unit has two locating rods perpendicularly affixed to the shaft at two sides in a line and two cutters respectively movably mounted on the locating rods, locked thereto with a respective lock screw and abutted against an outer periphery of said hole-cutter.

Abstract: A handsaw for holding a saw blade for cutting is disclosed to include a handle having an cantilever bar, an extension bar pivoted to the cantilever bar and turnable relative to the handle between a received position and an extended position, a blade-retaining arm pivoted to one end of the extension bar remote from the handle and turnable about the axis of the extension bar, and two blade retaining members respectively provided at the handle and the blade-retaining arm for the mounting of a saw blade when the extension bar is turned to the extended position.

Abstract: A steel strip cutting method includes the steps of: (a) preparing an upper die having a straight accommodation groove and a straight cutting groove and a bottom die having a straight accommodation groove and a straight cutting groove corresponding to the straight accommodation groove and straight cutting groove of the upper die, (b) attaching a steel strip having rigid beads welded to one lateral side thereof to have the rigid beads be accommodated in the straight accommodation groove of the bottom die outside the straight cutting groove, and (c) closing the upper die on the bottom die to cut off the steel strip corresponding to the straight cutting grooves of the upper die and the bottom die.

Abstract: A hole saw includes a shaft, a hole-cutter and an adjustable outer cutter unit. The shaft has a bottom coupling hole for receiving a pilot drill, a top coupling rod for fastening to a driving tool, and an outer thread extending around the periphery thereof. The hole-cutter has a top center inner thread threaded onto the outer thread of the shaft. The adjustable outer cutter unit has two locating rods perpendicularly affixed to the shaft at two sides in a line and two cutters respectively movably mounted on the locating rods, locked thereto with a respective lock screw and abutted against an outer periphery of said hole-cutter.

Abstract: A hole cutter includes a shaft connectable to a rotary driving tool, a ball mounted in a locating hole of the shaft, a detachable hole-sawing blade assembly detachably inserted into a bottom open chamber of the shaft, a socket supported on a spring member provided at the shaft to force the ball to lock the detachable hole-sawing blade assembly, and a drill bit inserted through the detachable hole-sawing blade assembly into the inside of the shaft and locked by a screw rod.

Abstract: A door lockset mounting tool includes a base body, which has a first plate member and a second plate member fixedly arranged at right angles, a first positioning hole defined in the first plate member, and a second positioning hole defined in the second plate member, a positioning mechanism, which is movably mounted in the first positioning hole of the base body for defining a first drilling center, and a positioning device, which is mounted in the second positioning hole for defining a second drilling center.

Abstract: A cutter includes a handle having a receiving chamber, a positioning device movably mounted in the receiving chamber, a support member mounted inside the receiving chamber, and a cutter blade having a coupling notch coupled to the support member and a locating notch coupled to the positioning device for detachably firmly receiving the cutter blade in the receiving chamber of the handle.

Abstract: A saw blade includes a base body and a plurality of groups of saw teeth. Each group of saw teeth is provided with a first section and a second section, wherein the first and second sections are adjacently positioned and respectively include a plurality of pre-cutting saw teeth, each of which has a first clearance angle, and re-cutting saw teeth, each of which has a second clearance angle. The pitch between each two saw teeth is the same with the others, but the first clearance angle of the pre-cutting saw teeth and the second clearance angle of the re-cutting saw teeth are different from each other.

Abstract: A connection device is, designed to connect a boring saw to a rotating tool and is formed of a shaft, a locating member, a sleeve, and a nut. The shaft is provided with a shaft hole to receive a bit, and a connection portion for fastening the shaft with the rotating tool, a first outer threaded portion which is engaged with the nut, and a second outer threaded portion which is engaged with the inner threaded portion of the rotating body of the boring saw. The shaft is fitted into the sleeve which is urged by the nut to press against the rotating body to be fastened securely with the rotating tool.

Abstract: A connection device is, designed to connect a boring saw to a rotating tool and is formed of a shaft, a locating member, a sleeve, and a nut. The shaft is provided with a shaft hole to receive a bit, and a connection portion for fastening the shaft with the rotating tool, a first outer threaded portion which is engaged with the nut, and a second outer threaded portion which is engaged with the inner threaded portion of the rotating body of the boring saw. The shaft is fitted into the sleeve which is urged by the nut to press against the rotating body to be fastened securely with the rotating tool.