describe High quality: Made of carbide with srper holes, more durable, not easy to rust. Srp blade: Alloy material, thick cutting edge, solve the problem of old broken knives, greatly improve the toughness of the blade. Unique design: Three-pronged head design and scientific principle for woodworking, high drilling efficiency and smooth chip removal Universal: This product is compatible with nd drills, cordless drills and bench drills, etc. Product description Carbide tip Suitable for rdwood, solid wood panels, particleboard, fiberboard, melamine panels and other abrasive materials Ideal for cabinetmakers and carpenters (windows, doors, kitchens) Carbide tip Durable carbide material. Single titanium coated drill bits for wood Drill every arc in any direction. Pockets for drilling overlapping holes or edges. Drill a true, clean and accurate flat bottom hole. For use with a drill press (drill column). Remove waste quickly. Aggressive cutting. Tungsten steel s a long service life. There are several sizes of drill bits for you to choose from. Size: 60*80*9.6mm Package includes: 2 * hole opener