Quick release nut: Quick release nut with M14 thread for fastening and quick release of diamond discs, cup-shaped grinding wheels, grinding wheel and other accessories. Non-slip design: The bottom has a fine frosted texture, so the nut blocks the grinding wheel without slipping. Please wipe the disc, spindle and nut clean. Quick release before use to prevent them from being caught by foreign objects. Material: Made of high quality materials. Alloy high strength, works without deformation, can withstand 40N torque and 12,000 rpm. High speed, longer service life. Compatibility : Compatible with all M14 angle grinders on the market. ; Suitable for diamond cutting discs, grinding wheels, cup wheels, diamond disks etc and most other types of grinding wheels. Attention: Please check the nut for defects and damage before use to avoid safety accidents. Diameter 49mm, height 13mm, weight 114g. Fits perfectly, powerful product and super fast delivery! It is the perfect accessory for all angle