Bosch twist drill set hss co din 338 straight shank bosch 2607019924 these hss co twist drill sets from bosch comply with din 338 and have straight shanks 6 piece robust line metal drill bit set hss co 2 3 4 5 6 8 mm din 338 135 bosch 2607019924 twist drill set hss co din 338 straight shank 2 to 8mm 6 pcs