Milwaukee SHOCKWAVE Impact Duty 30 knuckle pivoting bit holder allows users to drive fasteners and drill holes in tight, difficult work areas. Its innovative, compact design locks at a 0 or 30 angle and is designed for use with SHOCKWAVE Impact Duty 1/4 in. hex accessories. It is rated to handle up to 2,000 in-lbs of torque in impact drivers . The 30 knuckle is engineered with Milwaukee SHOCKWAVE Impact Duty technology which is built for extreme durability and up to 10x life. Made from proprietary steel and heat treated to control hardness, the SHOCKWAVE Impact Duty insert bits feature an innovatively designed geometric shock absorption zone to extend life. 10 SHOCKWAVE Impact Duty insert bits are included.