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. 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 High-density particle coating is used, the is and , and can quickly penetrate hard materials such as concrete, tiles, marble, etc. 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: Aisuoka