Although designed to cut Woodruff keyways, the profile of the 505 cutter will also generate a T-slot to accept standard Myford T nuts. The cutting head is Ø5/8" x 5/32" deep. Each of our Rotary Tables and Angle Plates can be cut with T slots to accept your existing Myford accessories. A great time saver. This cutter is also required for the Hand Turning Rest (HK 1330). Cutters have unthreaded, Ø1/2" parallel shanks.