Applicable tools: electric drill, for bench drill, high power electric grinder, pneumatic drill, magnet drill It is simple to install and easy to use It only needs to be installed on an ordinary hand drill Working noise is low It is cemented, with overall high-temperature quenching, durability, rust and 15mm, 20mm, 25mm, 30mm, 35mm Clear specification marks, easy to identify and to choose Advanced technology manufacturing Suitable for industrial hinge installation, wood processing and maintenance, model production, installation of spherical door, drawers and other occasions.Any wood and wood products,, plywood and other materials you need to exquisite perforation, Manufacturer: Kaeltsyn