Tapper according to different sizes of circles with different aperture and specifications, and according to the depth of the hole, it is divided into two types: Standard Tapper and deep load Tapper, which are installed in electric hand drill, impact drill, radial drill etc. Electric Tools use 

There are two common types: fixed diameter and variable diameter (aircraft). Variable diameter Tapper is commonly used in indoor and outdoor decoration.

The fixed diameter is Tapper, and there are common type, impact type and water-cooled type, among which water-cooled type is often used for wall opening, with high work efficiency and beautiful opening.

According to the material classification: double metal Tapper, hard alloy Tapper Tapper, Diamond Tapper Tapper. Different materials are used to cut different materials. The most commonly used material is bimetal Tapper. Hard alloy is recommended for harder metal materials, glass, carbon fiber, ceramic we recommend that you use materials that are easy to crack and break. Diamond tapper^[