1534SH SH series Twist drills for hardened materials Specially designed chip geometry for very high stability. High performance coating for longer tool life. Diameter range 3.0–16.0 mm (3xD) S cut 1105SC SC series Twist drills for aluminium alloys Equal nominal diameter and shank diameter. Diameter meter 2.0–16.0 mm (3xD, 5xD) Straight cut 1165PA PA series Three-lips drills for aluminium alloys Three cutting edges provide high concentricity and therefore high feed rates. Equal nominal diameter and shank diameter. Diameter range 3.0–20.0 mm (3xD) Straight cut C 105