Available for most end-slide positions in plain, reversible, or angular 45 degrees. The Turning Knee uses standard tool bit tooling. Turning Knee Reversible tool bits can changeover for use in multiple positions. Turning Knees are available for most types of screw machines including Acme, New Britain, Cone, Warner & Swasey, and Wickman Machines. For flat, angular or radius base, please specify your machine make and model.