Quick clamping nut: quick clamping nut with M14 thread for quick fastening and loosening of diamond blades, cup-shaped grinding wheels. Sanding disc and other accessories. Non-slip design: The bottom has a fine frosted texture so that the nut blocks the grinding disc without slipping. Please wipe the disc, spindle and quick release nut before using to prevent them from being stuck by foreign objects. Material: Made of alloy high strength, running without deformation, can withstand 40N torque and 12000rpm. High speed, longer life. Compatibility: Compatible with all M14 angle grinders on the market; suitable for diamond cutting discs, abrasive discs, cup wheels, diamond discs and most other types of grinding discs. Attention: please check the free of defects and damage on the nut before using it to avoid causing safety accidents. Diameter 49mm, height 13mm, weight 114g. Delivery quantity: 1 pieces