Miwaukee tools are great. I have a m18 3/8 impact. I am a auto mechanic so i use it everyday all day. If you want a cordless impact that is as powerful as a 1/2 air impact look at ingersol rand http://www.ingersollrandproducts.com/am-en/products/tools/Iqv-cordless-tools/iqv20-series-cordless-tools/w7150-1-2-20v-high-torque-impactool