Review on NEWTRY 8Mm Pneumatic Hole Puncher Air Metal Hole Punch Tool Industrial Sheet Metal Punching Gun Heavy Duty Metal Hole Flange Opener For Doors & Windows, Factory, Office And Home by Nick Howard

I had to put about 4,000 holes in galvanized drip edge. The drill press took way too long and distorted the metal. My lever puncher was faster, but still too slow and tough on my wrist. So, I bought this thing, not really expecting much from the other reviews. But it punched every hole perfectly with no problems at all. Like all pneumatic tools, remember to lubricate it every time you use it, and keep the air pressure around 90 psi.