At work we have Hilti Bosch and Milwaukee rotary hammers the only ones that have held up have been the Hilti's. We are a heavy and highway contractor we beat the shit out of these drill on average we will get about 10 years out of a TE76 gun Bosch about 2 years and we have only had the Milwaukee's for about a year. We also have Hilti powder actuated guns, core drills, cordless epoxy guns, etc. I feel they are quality tools for the price and I have a good sales rep that always throws up free accessories and consumables Sent from my iPhone using Tapatalk