Professional Pneumatic Air Hole Puncher 4.2mm Hole Opener Punching Perforator

Professional Pneumatic Air Hole Puncher 4.2mm Hole Opener Punching Perforator Feature: 1.Detachable air inlet tightly connected to the air pipe. 2.The metal shell is stable and durable withstands higher power and resists falling and compression. 3.The comfortable handle and smooth surface make it easier to use. 4.White steel forging high hardness firing pin can be hit stainless steel. 5.The firing pin is forged from a special alloy steel material which is durable and has sharp impact. Specification: Punching capacity: 4.2mm Unilateral stainless steel: ≤0.1MM Unilateral aluminum plate: