A quality cobalt countersink bit from FISCH, chatter and burr free finish and suitable for nearly all materials. Creating a high surface quality in hard and soft wood, manmade matrials, non-ferrous metals, stainless steel sheets, plastics, as well as in alloyed and unalloyed steels. This 90° countersink has 3 precise sharp edges.HSS-E (CO5). Available in three sizes 10-4mm, 12-4mm and 16-5mm. Made in Austria.