Bosch twist drill set hss co din 338 straight shank bosch 2607019926 these hss co twist drill sets from bosch comply with din 338 and have straight shanks 13 piece robust line metal drill bit set hss co 15 2 25 3 32 35 4 45 48 5 55 6 65 mm din 338 135 bosch 2607019926 twist drill set hss co din 338 straight shank 15 65mm 13 pcs