About this item 35MM POSITIONING BITSIt is more accurate and safer to use these bit sets on your drill press. The tip is specially designed for drilling holes cleanly, ideal for drilling concealed hinges and door locks. Excellent performanceThe head is designed with an arc shape, which can remove debris and has high working efficiency. The cutting edge is sharp, the positioning is precise, the hardness is high, the precision is high, and the cutting is stable. This drill drills clean, flat-bottomed holes without chipping. HIGH QUALITYHigh quality alloy blade, hardened, tempered and carbon HSS steel frame makes the blade sharper and more durable. More fluid and less noisy. The knives are painted, waterproof and anti-corrosion. Woodworking toolsSuitable for drilling holes in wood. Precision grinding is suitable for heavy use, easy to resharpen, can easily enlarge existing holes, and can enter any arc. Multiple usesCan be used for perforated wood products , fixed targets, drawers, plastic products, wood, plywood, etc. Suitable for pistol drills, bench drills, vertical drills, portable electric drills, vertical electric drills and moving belt magnetic drills, etc.