Carver's screws are the perfect solution for holding odd-shaped work pieces when doing three-dimensional carvings. The tapered screw is threaded into a pre-drilled hole in the back of the work piece and tightened via a wrench or the square hole in the screw nut. The other end is placed through a hole in a workbench or table and secured in place with the large threaded wing nut. This 2 piece set contains one large screw and one small screw.