I bought this cordless impact wrench for a Simpson Quik Drive Pro300S system. This engine has adapted well. The power allows me to drive heavier screws than drywall. I use it for cement board (CB3), subfloors (WSV) and pressure treated decks (DSV). This is a cheaper option than the Fein that Simpson offers. The 5Ah battery I had and will last around 3-6 hours depending on the screw. Great engine for what I need!