Professional-quality craftsmanship. Thick blades can be sharpened multiple times. Easily stored between jobs. Helps you quickly, ideal for making clean, flat-bottomed wood holes. Made from carbide for durability. Along the rounded edge, drill all arcs of the arc in all directions; ensure waste is removed quickly and correctly, ensure true, accurate, and clean flat-bottomed holes, and ensure productivity. The PTFE coating on the valve body prevents the adhesion of debris, resin, and residue. Provides visibility and stability during operation. The central gear of each drill ensures precise drilling and prevents walking and wobbling during operation. The sun gear is designed to perfectly form a round and accurate hole. Suitable for drill presses, impact drills, bench drills, vertical drills, hand drills, drill presses, and mobile assembly drawers with ball head drilling, drawers; wood products, plastic products, wood and plywood perforations. All kinds of woodworking lap joints, inclined holes, hinge holes, cylindrical holes, threaded holes for computer desks, and easy drilling and domestication for cabinet fixing. Ideal for making flat bottom holes. Good impact resistance and toughness. Precise and clean flat-bottomed hole for quick waste removal. It is safer and more accurate to use this drill bit in a drill press. In the arc-shaped design, the nozzle can effectively remove debris and the work efficiency is high. Specifications Product Name: Woodworking Countersunk Drill Bit Set with Hexagonal Cork Shank Style: 4pcs Barrel-Type Corkscrew, 4pcs Claw-Type Corkscrew (Optional) Product Weight: 4pcs Set 116g claws 4-piece cartridge 102g Safety: The drill must be used on the drill. The machine speed must be between 1200 and 6000 rpm. Do not use on routers (flow rate too high). Compatible machine types: Each drill bit socket fixed. Maximum revolutions: 6,000 rpm Suitable for impact drills, bench drills, portable electric drills for vertical drills, vertical electric drills and magnetic drills mobile band. Note: 1. The size is measured by hand, please allow the error (1-3 cm). 2. Due to different display pixels, there may be some color difference, please refer to the actual product.