Rated 5 out of 5Â by Redtractor DeWalt extreme drills
The 5 - 10mm sizes of these drills seem excellent for drilling timber or steel without needing a pilot hole. However the sizes below 5mm lack both the flatted shank and the pilot ground on the point. These smaller drills are ground pretty much as a standard twist drill.
Whilst excellent for drilling straight to size (actually they appear to cut slightly oversize) the flat edge beyond the pilot on sizes 5mm and above means they are not good at centring on a pre-drilled pilot hole. I would advise anyone buying these to just get the 5, 6, 8 and 10 mm drills to benefit from the self piloting design up to the point where power requirements in metal mean you need to increase hole size in a series of steps.
I do not think this set or the larger set are good value as the drills below 5mm lack any design advantage to justify their cost and the drills larger than 10mm are not much use on metal unless you have a very powerful drill or can accept the poor centring.
Too early to comment on reliability.
28 Apr 2014
Rated 5 out of 5Â by SuffolkGarageMan Brilliant Drill Bits
I was struggling to drill out some socket screws with ordinary HSS drill bits. Used one of these drill bits and the job was completed in seconds! Highly recommended for tackling drilling tasks in hard metals - can't comment on the potential longevity of the drill bits but I am sure that with careful use they will remain very sharp.
10 Mar 2014
Rated 1 out of 5Â by NorfolkBoy Lasted less than 10 minutes
Rubbish set of bits - unless it was a faulty batch. Two bits were totally blunt within 10 minutes of drilling old steel bolts of of a wood-burner door.
My advice - go somewhere else and buy a decent product.
21 Aug 2013
Rated 5 out of 5Â by najp1987 JUST GET IT
wow was unsure about paying out for these even tho work rebate all my costs, after struguling for over an hour trying to drill a metal lintle over a window i bit the bullet and bought them within a maximum of 15 seconds of contact between the drill bit and lintel it was drilled. hope they last a long time being dewalt i would expect so. all i will say is drill the exact size hole in one DO NOT PRE DRILL it bites very easily and you will lose your drill and do not appply preasure as when you are through the material it pulls the drill through so if anything go nice and slow so you can stop the chuck damaging the wall etc. HIGHLY RECOMENDED
3 Aug 2013