Dowel screws are designed to be inserted into a predrilled pilot hole. The end of the wood thread is designed as a taper that is threaded all the way to its blunt tip. Dowel screws are used as wood to wood fasteners for joining two pieces of wood. Use in home, office or industry. 10g x 50mm (2Ã¢â‚¬Â). Self colour steel. Each.