Number of reviews : 36
Average rating : 4 /5
Easy to install, high quality.
Had no problem with drill bit, I think other reviews I read on this was by people who didn't know how to let the drill do the work. I returned a extra drill bit a bought from Home Depot because I didn't need it . And I didn't break any screws because I made sure I drilled the holes deep enough to take full length of the screw.
The concrete drill bits furnished were of poor quality. I used both bits and did not complete attaching even one of the adaptor rings. Fortunately I had a set of good concrete drill bits.
I thought these would be hard to screw in being phillips head but they sent a special large size bit that worked well.