Tightener Shaft, Overall Length 3-3/8 In., Shaft Length 2-1/8 In., Thread Size 3/4-10 In., Thread Length 7/8 In., Use w/Drive Tighteners 6AGL1, 6AGL2, 6AGL9, 6AGL0 Drive Tighteners, Shafts, and Idler BushingsTightener ShaftsHardened and ground for maximum life. Use with idlers and drive tighteners. Include set collar and grease fitting.