Robert Sorby # 765/16 5/8" Diameter x 3-1/2" Long Stem Post for Modular Tool Rest System Modular tool rest system enables the turner to build up a collection of tool rests without going to great expense Made from precision ground polished and hardened allow steel 5/8 diameter stem is 3-1/2 long Stems interface with 6 different rests: 4", 6" and 9", internal and external curves and a box platform Made in England by Robert Sorby