It integrates the functions of drilling, hole expansion, chamfering, and polishing existing holes. It is widely used in various materials, including concrete, tiles, marble, , quartzite, and microcrystalline stone. High-density particle coating is used, the is and , and can quickly penetrate hard materials such as concrete, tiles, marble, etc. M10 thread interface is used, which can be easily connected to the 100mm angle grinder; the package contains a special conversion rod that can be quickly adapted to the use of handheld electric drills to meet the needs of different construction scenarios. 20mm/35mm/50mm are available to meet different hole diameter requirements, achieve precise hole expansion, and significantly improve work efficiency Designed for precise hole opening, it can easily meet DIY and professional needs. The three-step size makes drilling operations time-saving and labor-saving, Weight: 1.72842413408 Pounds, Manufacturer: Prterver