T Slot Cutters Metric 6mm 8mm 10mm 12mm 14mm 16mm 18mm 20mm 22mm 24mm 28mm 30mm for cutting T Slots in machine tables made in sizes to allow clearance for a range of bolt sizes Used for opening out top and bottom of previously milled slot to form T shaped slot Used for side and face cutting with threaded shank HSS Plain or flatted shank also made