Bosch twist drill hss r din 338 reduced straight shank bosch 2608596656 these hss twist drills from bosch comply with din 338 and have reduced straight shanks metal drill bits hss r din 338 with reduced shank 16 x 120 x 178 mm d 12 mm bosch 2608596656 twist drill hss r din 338 reduced straight shank 16 x 178mm