For quick attachment and detachment of discs and grinding wheels without the need for a wrench. Beautiful workmanship: The bottom has a slightly frosted texture to increase friction. The nut can lock the grinding wheel firmly and is not easy to slip. Premium material: This angle grinder nut is made of high-strength alloy material that does not deform, supports a torque of 40N and a high rotation speed of 12,000 rpm. Its quality is guaranteed and its service life is long. Quick-release nut with M14 thread for Bosch, Black & Decker, Dewalt, Flex, Hitachi, Metabo, Makita and many other brands of grinders. Precise and simple, saving a lot of time. Why you choose me 1. Quick-release nuts are made of high-strength alloy materials and can be used in high-strength working environments. 2. Quick-release nuts have a good matte texture to reduce the risk of damage caused by the nut slipping. 3. Compared with traditional nuts, it has a quick-locking structure and can be used to tighten bolts with bare hands. 4. The quick-locking nut is suitable for all M14 threaded angle grinders, suitable for DeWalt, Bosch, Makita, Metabo, Hilti, 5. Suitable for all angle grinders, diamond discs, grinding discs, cup-shaped discs, diamond plates and most other types of grinding discs.