Made of powered casting steel for stronger strength
Stud size is 1/2"-13 Fits all Bridgeport type milling machines. Made of powered casting steel for stronger strength. All parts are heat treated. Includes 4 each of 3", 4". 5" and 6" studs, 4 coupling nuts, 6 flanged nuts, 6 forged steel step clamps, 6 t-nuts, 12 steel step blocks, 1 wall rack, 1 t-slot cleaner and 1 wrench.