HSS jobber drill with straight shank DIN 338 N 118° steam tempered 4xD for steel High Speed Steel (HSS) provides good hot hardness when drilling Steam oxide finish reduces built-up-edge and helps lubricity Forets Acier Rapide Métal Pack De 10 Forets Dormer Jobber HSS - Pour Acier - Diamètres Variables Outillage Perçage Acier Dorer Jobber Drill Pack de 10 : Aazon.co.be Dormer 002 Jobber Drill Split Point, Pack Of 10 Patented Silver ring provides clear diameter marking