Drill bits can cause tearing, breaking, bending, and cracking when trying to cut holes into thin metal. Save your supplies with the ABN Brass Punch Chisel Set. This 5 piece non-marring punch set is constructed from solid brass to withstand repeated strikes from your hammer or mallet for all of your metalworking needs. Align the long brass drift punch with the placement of your desired hole, and hold in place firmly gripping the crosshatch texture, before tapping it through. This 5 piece solid brass drift punch set includes 1/4 x 4, 3/8 x 6.02, 1/2 x 6.81, 5/8 x 9.4, and 3/4in x 9.4 (10.2 x 6.35, 15.3 x 9.53, 17.3 x 12.7, 24 x 15.88, and 24 x 19mm) solid punches chamfered on both ends to easily create smooth round holes in any metal sheet. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.