SouthwireMP-XD Max Punch; Knockout Tool Used With Cordless Drill; Virtually Universal; Heavy Duty Cutting; Quick Accurate Knockouts; Thread-In/Thread-Out Removable Drawstuds; Torque Rated ; Black - MPXD-SD

I do not own this product. I use one at work though. I didn't know they were listed on Amazon.Anyhow. This kit is the best I have ever used. It will punch mild and stainless steel up to 4" conduit size with ease and I know this from using the same one for the past three years. I have 35 years of experience as an electrician and this is the best knock out punch I have ever used, bar none.I run this tool with a DeWalt battery drill on low RPM/High torque. It is not particularly fast, but it works every time.My only warning; read the instructions, it has a particular starting point marked on the shaft. Forget to reset it after each hole and you will damage it.

Great product. Manufactured by the same parent company that makes Milwaukee Tools.