Review on Klein Tools 89551 Replacement 12 Inch by Roger Diaz

. God, that was a mistake. Both drill bits required excessive force to cut just a 6 inch hole. When I needed to cut 40-50 holes per floor for a construction project, it was quicker to just hand-cut the holes. The first bit bent and became unusable when my drill fell over. The second drill broke off shortly after drilling began. That was enough for at least 10-15 holes.