Steam oxide finish reduces built-up-edge and helps lubricity Standard A100 ( Steam Tempered ) A 100 DORMER Jobber Drill, For HSS jobber drill with straight shank DIN 338 W 135° steam tempered 4xD for austenitic and ferritic / martensitic stainless steel Pack Brocas Jobber Bohrer Set Dormer Jobber - 10 Stück HSS Spiralbohrer - Split Point Broca Dormer Jobber High Speed Steel (HSS) provides good hot hardness when drilling Strong flute designed specifically for drilling stainless steels