Compatible with standard 5/8"-11 UNC grinders:this quick-release flange nut fits most 4-1/2", 5", 7" and 9" models. Not for M10/M14. Tool-Free Quick Change Design:Achieve tool-free quick change efficiency. The silver pull ring and black knurled grip allow instant hand tightening without a wrench. secure angle grinder attachments to reduce downtime. 2-Piece Versatile Flange Nut Kit:This angle grinder flange nut set . The ultimate 2-in-1 replacement parts kit for versatile grinding tasks. Optimized for Flush & Heavy Cuts:Use the low-profile silver nut for interference-free flush cutting, or the thick black nut for heavy-duty grip. Ensures a secure fit for thin cutting wheels, flap discs, and thick abrasive accessories., Weight: 0.37037660016 Pounds, Manufacturer: NONDK