Bought this for a signing project I had going on at work. Easily saved us from having to buy probably $2k worth of drill bits, not to mention the time savings. We used this on 3/8" steel I-beams with a handheld hydraulic pump(not what it was listed as to be used for). But it worked, and even managed to punch through a 3/16" sheet of 304 stainless(shattered the die, but made the hole!). I've bought 3 of these so far. The first one completed approximately 600-700 holes before the frame began to deform. (Not upset, as the tool paid for itself in time/payroll savings alone). The onky thing to note is that when you try to adapt fittings to work with this, you need to be aware that the thread coming out of the unit is British thread, not SAE/Metric, or even NPT. Most hydraulic supply stores can assist you in getting set up properly. Only real problem is finding the dies for this. If the manufacturer would set different die sets separately, that would be great. The ones that came with it however, do work and are quite durable.
John.Tanner 
