Alloy steel, aluminum, brass, bronze alloys, carbon steel, copper and stainless steel materialsCustom. Maximum part length is 4 in., while the outer diameter can range from 5/16 in. to 4 3/4 in. Capabilities Perfect Steerable Transfer Cartlude screw machining services like boring, deburring, drilling, grinding, knurling, milling, polishing, reaming, and turning.