These handles were made for hand screw clamps and are left over from the Jorgensen Clamp Factory before they moved operations to China. They are solid hard maple with thick chrome ferrules. Length is 4" and diameter is 1-1/4".  Center hole is 5/16" x 1-7/8" deep. The hole could be enlarged to suit any shaft size. They come unassembled. These would make excellent file, chisel or burnisher handles.