Quick clamping nut: Quick clamping nut with M14 thread for quick fastening and loosening of diamond blades, cup-shaped grinding wheels. Abrasive disc and other accessories. Non-slip design: The bottom has a fine frosted texture so that the nut locks the grinding disc without slipping. Please Wipe The Disc, Spindle And Quick Release Nut Before Use To Prevent It From Being Caught By Foreign Objects. High Quality Material: Made Of High Strength Alloy, 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 Pads And Most Other Types Of Grinding Discs. Note: When Using The Angle Grinder , protective gloves are required. Please Make Sure It Is Installed Well Before Use.