Bosch Drill Bit Set - Bosch 2607019925, These HSS-CO Twist Drill Sets from Bosch comply with DIN 338 and have straight shanks. 10-piece Robust Line metal drill bit set HSS-Co 1; 2; 3; 4; 5; 6; 7; 8; 9; 10 mm, DIN 338, 135°. Bosch 2607019925 Twist Drill Set HSS-CO DIN 338 Straight Shank 1 to 10mm 10-pcs