The 2-Pack 5/8"-11 Angle Grinder Flange Nut Kit gives you one kit with two smart solutions for securing grinding and cutting discs tool-free. The set includes a heavy-duty knurled arbor nut with a thick 13.5mm body that delivers maximum grip for demanding heavy grinding tasks, and a compact D-ring nut with a slim 9mm profile designed to fit tight spaces and enable flush cutting. Both nuts feature a self-locking mechanism for quick, tool-free disc changes, keeping your workflow fast and efficient. Compatible with standard 5/8"-11 attachments, this kit works seamlessly with 4-1/2", 5", 7", and 9" angle grinders and supports a wide range of discs including flap discs, grinding wheels, diamond blades, and cutting wheels. Whether you're tackling heavy-duty metal grinding or precision flush cuts, this versatile two-piece set has you covered.