Centring drill bit, hammer drill proof Accessory for core bits with a carbide coating Product advantagefor use with carbide-coated core bits and SDS-plus mandrels (Art. 5428000, 5425000)Technical specifications Drill hole diameter: 8 mm Drill hole diameter: 8 mm Drill bit length: 70 mm Drill bit length: 70 mm Drill bit point angle: 130° Direction of rotation: Clockwise Other product specifications: hammer drill proof