Features: brand new and high quality It is made of cemented carbide, with overall high-temperature quenching, durability, rust prevention and corrosion prevention. 15mm, 20mm, 25mm, 30mm, 35mm .Clear specification marks, easy to identify and convenient to choose .Advanced technology manufacturing, quality material, durable . Applicable tools: electric drill, for bench drill, high power electric grinder, pneumatic drill, magnet drill. Suitable for industrial hinge installation, wood processing and maintenance, model production, installation of spherical door, drawers and other occasions.Any wood and wood products, plastic, plywood and other materials you need to exquisite perforation. It is simple to install and easy to use. It only needs to be installed on an ordinary hand drill. Working noise is low. Specifications: Material:Cemented Carbide Diameter:15mm/20mm/25mm/30mm/35mm Color:Red Top Angle of Outer Edge: 45 ° Package Includes: 5 Pieces Forstner Drill Bits/Set note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.