Bosch Flapdisc Standard for Metal 4.5" P80 2608601709 They are finished to be a great finish when grinding edges, welded cracks, and sanded metal surfaces Semi-crushed aluminum oxide beads are durable and abrasion-resistant and help create a smooth finish. The sturdy support material is in X fabric: to provide stability when grinding and achieve clean, even results. The beads are connected using synthetic resin to resist corrosion in heavy-duty applications. The stand board is available in straight and angled versions of fiberglass and plastic. Designed to perfection Compact construction This will be an excellent pick for you Packed with features