punches holes great for patch panels, my only bitch is that i wish the anvil offset was a lil deeper, as i have to grind a "knife-edge" on the panels to get 'em flush. but overall a real time saver for the diy'er and a lot less then eastwoods price for one. keep it lubed!

It is an air over hydraulic tool and I have to add hydraulic fluid every time I use it to get enough stroke to make it punch