A quality cobalt countersink bit from FISCH, chatter and burr free finish and suitable for nearly all materials. Available in three sizes 10-4mm, 12-4mm and 16-5mm. Made in Austria.
25 July 2015
when it says "chatter free"...This really is chatter free, and since a lot of countersinks aren't, this was a pleasant surprise. I've only tried this on softwood so far, and it's given a very ridy finish, unlike my old one which left a very rough surface. Well worth the money.