1 of 1 people found the following review helpful
on 24 August 2012
Very good drill bit - cuts cleanly and very sharp when new. I also bought some 3.5mm drills of same make/model, but they started to blunt relatively quickly when drilling 3mm thick aluminium. This larger drill bit seems to hold its edge better. I like the pilot hole section at the tip - really helps to position an accurate hole in the material and avoid oval holes being cut in thin sections - I drilled a small pilot hole first, then followed up with the 8mm bit - perfect results.