Abstract: A hand tool assembly includes a handle having a connection portion formed on one end thereof by way of blow molding, and the connection portion includes a recess defined therein which includes a first inner bottom. At least one hole is defined through the first inner bottom of the recess. A head has the top thereof accommodated in the recess and includes at least one rod which is engaged with the at least one hole. At least one function part is connected to the underside of the head and protrudes beyond the recess. A board is connected between the head and the first inner bottom of the recess such that the head is replaceable.

Abstract: A hand tool assembly includes a handle having a connection portion formed on one end thereof by way of blow molding, and the connection portion includes a recess defined therein which includes a first inner bottom. At least one hole is defined through the first inner bottom of the recess. A head has the top thereof accommodated in the recess and includes at least one rod which is engaged with the at least one hole. At least one function part is connected to the underside of the head and protrudes beyond the recess. A board is connected between the head and the first inner bottom of the recess such that the head is replaceable.

Abstract: A putty knife handle is made up of an upper lid and a corresponding lower base. Both of them form a housing with location holes for insertion pieces and columnar tubes for insertion posts coupled and fixed with each other. The invention is characterized in that the upper lid and lower base respectively form at the front relatively a stepped projecting piece and a projecting seat. At the front of the projecting seats is a slot. Relative to the body of the lower base and behind the slot are U-shaped frames, which enable the clamping end of the blade to be implanted into the two U-shaped frames after being inserted through the slots to make it fixed firmly. Also the handle has a rubber coating for easy holding.

Abstract: A clamping device a sanding tool is comprised of a fixing body, a spring, a clamping plate, a pressing block and a buffer body; wherein, the fixing body is a rectangular base on the proper position of the center of which is installed with a high projected handle, while grooves are installed on the two sides of the base near the edge portion, a fixing stud is installed between the handle and the grooves, a buffer body is adhered on the bottom of the base, a spring and a clamping plate are attached on the stud; the distal end of the fixing stud is installed with a pin for engaging with said pressing block; by the upwards or downwards pressing force of the pressing block, the sand paper may be fixed.