Screw Feed Tubing CutterClean, square cuts are easily made on copper, brass, aluminum, and thin-wall conduit. Nos. 10, 15, 20 feature a convenient fold-away reamer. No. 30 is rated for larger diameter steel and stainless steel tubing. No. 15-SI is especially designed for stainless steel tubing. Heavy-Duty Wheel. Applicable Materials: Copper, Brass, Aluminum, Thin-Wall Conduit; Cutting Capacity: 5/8 in [Min], 2 1/8 in [Max]; Standard Wheel: E-1240; Weight: 1 3/4 lb.