
About this item
Self-centring hammer-action bit in steel, for fast, high-performance drilling in granite, natural and artificial stone, concrete and various building materials with hardness up to 7 on the Mohs scale. Made of steel with a hard-metal tip brazed at 1100 ° C and diamond-sharpened. Ground finish with high-discharge 'U' flute, bright finish, with red flute and cylindrical shank with 3 flats. Body hardness HRC 40-50, tip hardness HVA 1650. Sharpening angle 130°, right-hand helix.