3-d type valve seat cutter tool holder and drive unit. This comes as seen in pictures it is 3/4 drive unit with a. 389 pilot tool holder. This comes with everything in the picture!! 1 ball driver and ball tool holder- 3 tool bit holders -3 Allen wrenches -2 carbide 3 angle cutters -2 bounce springs with bushings -1 set-up tool -1. Driver & ball head Guaranteed forever.