The W.Y. International Twin Chuck E-Kit, No. 70040E, has no jaws to change and is optimal for shops with two or more brake lathes. It is designed for machining hub and hubless drums and rotors through 1-ton trucks as well as the 2004 through present Ford F-150 2x4 front rotor with press wheel bearing in the hub. The kit comes complete with two separate quick chucks - one with standard jaws and standard plate and the other with large jaws and large plate. Also include is a small plate, Toyota plate, Ford F-150 bushing and a 7-pc double taper adapter set.