Hand Forged Holdfast Designed to work in a 3/4″ hole, these work especially well in our torsion box benches but also solid top benches. Made by a local blacksmith friend of mine. Since the shaft is 5/8″ diameter, it has enough ‘spring’ to it to really hold a piece in place. The shaft is hand hammered for extra hold. 5/8″ Dia. x 10″ reach.