This positive rake left hand tool holder is designed to fit FMC/JOHN BEAN style brake lathes and is sold complete with a brake lathe bit already assembled. LEFT HAND TOOL HOLDER 3/8" Square Shank Fits all FMC/JOHN BEAN and ACCU-TURN brake lathes. Complete with one carbide Insert No. 407----FMC/JOHN BEAN, ACCU-TURN