[Features]● A dedicated hole type for folded plate roofs and roof bolts. ●Scratches on the surface of the shingle are reduced by using a stopper and a rotating ring to prevent it from coming off. ● The spiral shape provides light sharpness, allowing for speedy continuous drilling work and prevents chips from falling down. ●Impact compatible type.
[Applications] ●For civil engineering, prefabricated houses, and residential roofing materials.
