25 Pack Grinding Wheels 4-1/2 Inch for General Purpose Metal & Stainless Steel, Aluminum Oxide Grinding Disc 4 1/2 for Angle Grinder, Depressed Center 4.5" * 1/4" * 7/8" (115*6.0*22.2mm) 4-1/2" x 1/4" 25.0

Specifications:

Premium Aluminum Oxide Material: Made of industrial grade aluminum oxide particles, higher material removal rate, unparalleled excellent performance in terms of grinding life, speed, and accuracy, suitable for grinding both edges and surfaces
Excellent Grindding and Up 40% Performance Improvement: Maximum speed 13,300 RPM and 80 M/S achieving high efficiency and precision grinding, ideal for cleaning, rust removal, deburring and polishing
Safety and Reliability: Reinforced with double-layer fiberglass mesh, ensures excellent safety and stability, and is not easy to break;Depressed center design easy to hard-to-reach areas, suitable for multi-purpose grinding discs for surface, contour, edge and radius grinding
Extra Long Life and Durability: Features near-perfect heat dissipation to minimize heat burns, greatly time saver for replacing grinding wheel; Supplemented with moisture-proof fiber cloth to ensure its performance is not affected by moisture and corrosion
Wide Range of Applications: Ideal for high speed and aggressive grinding in professional metalworking, maintenance repairs and the construction industry; Effectively used for steel, stainless steel, aluminum, copper and other metals
Compatible with Angle Grinders: The grinding wheels are 4.5 inches in diameter, 1/4 inches thick, with a 7/8 inch shaft hole, compatible with most standard angle grinders