COMPATIBILITY: 4.5" x 5/8"-11 Metal Zinc-alloy Locking Nut included CONSTRUCTION: High - Quality Backing Pad for Resin Fiber Sanding Discs,Spiral Raised Ribs (Cooling) DIMENSIONS: 4.5-inch diameter pad with standard 5/8-11 thread size fits most common angle grinders VERSATILITY: Cooling features can extend life of Resin Fiber Disc 30% - 50%,Rigid Polypropylene Pad with Cast Alloy Plate,Suitable for various sanding, grinding DESIGN FEATURES: Ribbed attachment surface ensures secure disc mounting and prevents slippage during operation This 4.5-inch angle grinder backing pad is designed for superior performance with resin fiber discs. Featuring a robust 5/8-11 threaded mount, this backing pad provides reliable support and stability during grinding operations. The ribbed attachments ensure proper disc alignment and enhanced heat dissipation during use. Perfect for metalworking, fabrication, and general material removal tasks, this backing pad delivers consistent results while maximizing the life of your for resin fiber discs. The durable construction withstands demanding applications, making it an essential accessory for professional workshops and DIY enthusiasts alike. Compatible with standard 4.5-inch for resin fiber discs, this backing pad helps maintain optimal contact pressure for efficient material removal.