Review on DAMO Electric Drill Adapter Shank by Travis Rogers

Uses this adapter for 3/4" diamond drill bit - wet drilling at very low speed <900 rpm. Didn't last at all. The first time the drill "got stuck" on the hole, the mandrel bent during drilling and the drill slipped off the axis. That was it because the holes had to be within tolerance. No play caused by the deviation of the chisel from the axis must be allowed.