Interesting replies and a surprising number of single post posters. I'm feeling vindicated that I was never bother to buy the stuff , pretty much because I didn't believe the hype.
I've had drill bits for decades and if blunt I sharpen them be they for wood , metal or masonry . It's only if they snap or break that they need replacing.
I've had drill bits for decades and if blunt I sharpen them be they for wood , metal or masonry . It's only if they snap or break that they need replacing.