Alpen 25 Piece HSS Cobalt Jobber Drill Bit Set ALP KM25COB

Professional 25-piece alpen hss-eco cobalt drill bit set in a durable metal cassette. Contains sizes from 1.0 mm to 13.0 mm in precise 0.5 mm increments for accurate, versatile drilling. Made from 5% cobalt-alloyed hss with excellent heat resistance, these jobber drills are ideal for demanding applications and extended service life. Suitable for drilling steels with tensile strength over 800 n/mm, including high-alloy steels, bearing steels, and hot or cold-rolled steels. Perfect for stainless steel and hard-to-machine materials. Recommended for: - structural steels < 400 n/mm - free-cutting steels < 850 n/mm - unalloyed heat-treatable steels < 1,100 n/mm - alloyed heat-treatable steels < 1,300 n/mm - copper, brass, aluminium - stainless steels - grey cast iron, malleable cast iron - plastics article no.: 00 001002251 00. | alpen cobalt drill bit set 25 piece 1-13mm x 0.5 in metal case rotary bit set, plastic/stainless steel/brass