I've had great luck with CMT tips in the past and this one is good but seems to dull a little quicker than me. hoped. I decided to redecorate the garage and wanted to give it an industrial touch, so I built a new landing and stairs to the laundry room using ground 1/2 inch electrical wire as the stair railings. The 18mm hole is the perfect size and this piece did the trick well. However, starting at the 50th (last) hole, it was noticeably more tiring to drill the hole, even in the relatively…