MuscleChuck Camless Quick Change 1/2-Inch Chuck Fits Bosch 1613, 1617, 1618, 1619, 1400E, GOF2000, Makita 3612C Type 4:Bosch 1613, 1617, 1618,1619, 1400E, GOF2000,Makita 3612C HITACHI M-8V2, M-12VC, M-12SC, M12V8 1/2-inch shank can use bushings for 1/4-inch, 8mm and 3/8-inch shanks. Length: 1.3 in (Approx) Run Out: &lt;.002 in High Quality Alloy Steel. All materials and processes certified to aircraft standards.