These countersinks from FISCH are both chatter and burr free. They produce a high quality surface finish on almost all materials. Recommended for use on alloyed and non-alloyed steel, high quality steel plate and soft and hard woods. Available in two sizes 2-5mm and 5-10mm. Made in Austria.
19 July 2017
Disappointing outcome on stainless steelI tried to use this countersink on stainless steel and the cutting edge broke after 30 seconds, not going halfway through the first countersink. I then used an older and less expensive bit to countersink 20 holes on a stainless steel bar without any problems. The drill press was the same as well as the speed, cutting oil and technique.
26 July 2016
Very happyIts not cheap but leaves perfect finish. Could not ask anything more.