"I use these drill bits on vitreous enamel flue pipes, fixing them to their various adaptors and to flue liners. Every time I work with other fitters, they without fail ask what drill bits I use due to the amazing speed these things get through the pipe. An added bonus is their accuracy, it is rare for them to slip on even a cylindrical flue pipe, which other bits certainly do."
"The best drill bit i have ever purchased! It's so fast, eats through 5mm steel like butter. Groves to stop it spinning in the drill chuck. Used many time and still as sharp as the day i brought it. No other drill bits can keep up with this one. Highly recommend!!! FAST, ACCURATE, STRONG, NO SLIPPING"
"Having used various drill bits over the last 40 odd years, I cannot sing the praises of these bits enough. Long lasting, no slip and do not spin in the chuck. Well worth the extra money. The only ones I use now."
"A very sharp and strong bit. Used it to drill out a seized steel bolt. It chewed through it no problem although by the end of it it did become blunt but this was expected. Other standard bits just blunted and glowed red after a millimetre or two.
Given the price, I was happy with it and am considering replacing all my bits with this range."
"I have never written a review for anything before but these drill bit are very good. I drilled about 200 - 300 pilot holes in mild steel with one of these, it didn't let me down until I got too confident and snapped it."