Easy to use: This quick release nut is a quick lock structure that can be tightened very firmly and will not loosen easily. It can be tightened or loosened without using a wrench. The process of use is very simple and quick. Exquisite workmanship: the bottom has a slightly frosted texture to increase friction, and the nut can lock the sanding disc firmly and do not not easy to slide. Excellent material: This clamp nut is high strength alloy material, high strength work does not deform, withstand 40N torque and rotating speed high speed of 12,000 rpm, the quality is guaranteed and the service life is long. Wide range of applications: the collet nut is suitable for all angle grinders. 39; angle with M14 interface on the market, DeWalt, Bosch, Makita, Metabo, Hilti and of course also for all not mentioned angle grinders such as diamond cutting discs, cup-shaped sanding discs, diamond plates and other types of abrasive discs. Note: if the torque is too large to remove it er, you can