3005-U drill blade fast violent drill XQMT060204 bladeU drill blade XQ SP series: 1. Processed with imported technology, it is harder, sharper and more wear resistant, and has a longer lifespan 2. The blade is made of raw carbide material, ground and sintered at high temperature, making the blade strong in overall impact resistance and not prone to chipping 3. The interior is made of high hardness tungsten steel, and the exterior is made of high stress deposition sprayed nano coating, which is hard and