Review on Hammerhead 7 5 Amp Variable Hammer Concrete by Chris Hernandez

I am installing an inverted U stand for my expensive bikes. I needed 8 1/4" holes 1" deep in the bottom of the canopy. The drill feels nice, looks good and worked well for the first 7 holes. Then the cartridge disintegrated into 5 parts. It wouldn't be together again. I'm sending it back and trying a replacement. Shame on me if that doesn't work. I will edit this review after the work is done. It will be given to my son who has a project in his garden. Update: Revain sent a replacement after 15 hours! I got the job done and I'm happy. Renting for 4 hours at a not-so-local hardware store costs $5-10 more than this purchase.