- Quick-release nut: quick-release nut with M14 thread for quick loading and unloading of diamond inserts and cup wheels. Abrasive discs and other accessories. 2. Non-slip design: The bottom has a delicate matte texture, so that the nut blocks the grinding disc and does not slip. Please wipe the disk, spindle and quick release nut before use to avoid being stuck by foreign bodies. 3. Material: Made of high-strength alloy, the work is not deformed, and it can withstand 40N torque and 12000rpm. Fast and long life. 4. Compatibility: Compatible with M14 angle grinders on the market; suitable for diamond cutting discs, abrasive discs, cup wheels, diamond discs and most other types of abrasive discs. Note: Please check the nut for defects and damage before use to avoid safety accidents. Diameter 50mm, height 13mm Quantity delivered: 2 pieces