"I bought 3 of these after reading reviews, and i was shocked at how well these drill bits perfomed. I had to bore 126 holes through 1/8th thick steel rhone hooks, and only used 2nd one for last 14 holes, no slipping about on metal surface. would say these are the best i have used on steel, not overpriced either."
"bought some drill bits from another company, went dull really quickly so thought i'd try dewalts extreme range - loads better and cheaper too. drilled about 120 holes now and its still pretty sharp. dont think i'll used anything else now"
"These are very good, reliable drill bits, that keep their edge and are precision made. But be warned they are aggressively set and the larger bits do to have a tendency to sn@tch- use caution especially when using in pillar drill, make sure work pieces are well supported."