-Standards : DIN ISO 5749. -Head shape : Semi-circular, swedish style. -Material : High quality C 70 tool steel, specially tempered. -Design : Low wear lap joint, riveted and able to withstand high loads. The Wiha DynamicJoint ensures optimal transmission of hand strength to the cutting edges. Lightweight action, clean cutting achieved by specially milled precision cutting edges. Durable cutting edges due to additional induction hardening to approx. 62 HRC.