For quick attachment and release of discs and grinding wheels without the need for a wrench Beautiful finishes: The underside has a slightly co.ukosted texture to increase co.ukiction. The nut can firmly lock the sanding disc and will not slip easily Premium Material: This angle grinder clamp nut is made of high strength alloy material that does not deform, which withstands 40N torque and high rotational speed of 12,000rpm / min. Its quality is guaranteed and its lifespan is long Quick clamping nut with M14 thread for for Bosch, Black & Decker, Dewalt, Flex, Hitachi, Metabo, Makita and many other brands. Precise and easy saves considerable time Why do you choose me 1. Quick assembly nuts are made co.ukom high strength alloy material and can be used in high strength working environment. 2. The quick-fit nuts have a good matte texture to reduce the risk of injury when sliding the nut. 3. Compared with traditional nuts, it has a quick locking structure and can be used to tighten bolts