Quick clamping nut: Quick clamping nut with M14 thread for fastening and quick loosening of diamond discs, cup-shaped grinding wheels. Abrasive disc and other accessories. Anti-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 avoid them being stuck by foreign objects. Material: Made of high strength alloy, working without deformation, can withstand 40N torque and 12,000 rpm. 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 product for defects and damage #39;nut before using it in order to avoid causing safety accidents. Diameter 49mm, height 13mm, weight 114g. LRFR is committed to providing each customer with the highest possible quality of customer service.