[Features]-Suitable for drilling holes in mortar, blocks, bricks, ALC, gypsum boards, inserting plug anchors, and drilling pilot holes for plugless screws. ●No vibration drill required. You can drill holes steadily with charging impact. ● Asymmetric special carbide tip shape. The cutting speed is more than 4 times that of general shapes. ● Chrome molybdenum steel that can withstand high loads. Integrated machining from the cutting edge to the hexagonal shaft. ● O-rings are color-coded by size. ●Smoothly inserts into the anvil and does not dig into the ball grooves. ●Left and right asymmetrical shape The cutting edge has excellent sharpness and speeds up cutting.