Rated 5 out of 5 Superb on cyclindrical surface
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.
Rated 4 out of 5Â by GenericTradesman Drills holes
Not the best but by no means the worst.. Does a good enough job for day to day drilling.
Rated 5 out of 5Â by junkyardjohnny Probably the best drill bit
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
Rated 4 out of 5Â by stevo23 so far so good
cut through 3mm steel 54 times so far using a pillar drill and 3 in 1 on the tip of it. if it lasts the next 100+ cuts I will be very impressed