➤【5 SIZE DRILL SET】: Make clean cuts with 15mm, 20mm, 25mm, 30mm and 35mm drill bits. Suitable for a variety of occasions, punching on wood products, plastic products, wood and plywood. (Please do not drill into the metal) ➤【EXCELLENT PERFORMANCE】The head is designed with an arc shape, which can eliminate debris and provide working efficiency high. The cutting edge is sharp, the positioning is precise, the hardness is high, the precision is high, and the cutting is stable. The drill bit can drill a clean flat bottom hole without chipping. ➤【HIGH QUALITY】High quality alloy blades, hardened, tempered and carbon HSS steel frame make the blades more sharper and more durable. More fluid and less noisy. The knives are painted, waterproof and anti-corrosion. ➤【WOODWORKING TOOLS】Suitable for making holes in wood. Precision grinding is suitable for mass use and easy to resharpen. They can easily enlarge existing holes and can punch through any arc. ➤【VARIOUS USES】It can be used for punching wooden products, set goals, 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. Product description 5 drill bits in a wooden box Reliable and quality tools The versatile bits included in this set are constructed with tough high carbon steel to cut a variety of materials. They cut extremely smooth and clean flat-bottomed holes in all wood species, including thin woods or veneers. Perfect size: 15mm 19/32"), 20mm （25/ 32"), 25mm（1"), 30mm（1-3/16"), 35mm（1-3/8") Precautions: Be sure to put on safety items suitable for protection. Keeping cool or discontinued use will greatly extend the life of the drill. TIPS: Cannot be used to cut metal holes. Before drilling, make sure that 'there are no nails or other metal objects in the wood to avoid damaging the drill bits.Box of 5 drill bits for professional wood treatment High quality tungsten carbide steel, curved design for optimized chip removalHigh quality tungsten carbide steel, special heat treatment technology, sharp edge, high hardness and durability The cutter head arc design improves opening speed, easy chip removal and less dust and debris during the cutting operation. Punching is sharp, smooth, without broken edge.Three-tooth cutter head with small incision resistanceThree-tooth cutter head design provides high sharpness, low cutting resistance and opening efficiency improved. The three-tooth design of the cutter head has high sharpness, small cutting resistance and improved opening efficiency. The sharp center spur accurately locates the center of your hole.Heavy duty blade, universal shankThe hexagonal shank is made of solid hardened steel, high hardness. Can be used in hand drills and drill presses. WIDELY USED Suitable for drilling holes on all wood and wood products , treatment and maintenance of wood, production of models. Can easily enlarge existing holes and drill any arc. Drills flat bottom holes, pocket holes and overlapping holes. Ideal for boring concealed hinges and door locks. The cemented carbide tip is designed to cleanly cut the hole. Can be used for punching wood products, mounted spherical door shooting point, drawer, plastic and wood products, plywood, etc. Suitable for bench drill , the vertical drill and the electric hand drill, the motor drill on stand, etc.