Premium Material- Different from other sanding bands, our sanding bands are made of blue zirconium corundum sand which is water resistant, high hardness, heat resistance, more durable than belts made of alumina 8 Pieces- total 8pcs 100 x 915 industrial sanding belts, meet your daily sanding and polishing needs Precision Connection - Joint bi-directional belt sander precisely designed, the diagonal connection eliminates the splice bump, the sanding belt interface of the belt sander is flat, firm and not easy to break under pressure Perfect Craftsmanship - Our sanding belt adopts fully bonded resin to make the adhesion between the sand and the belt higher, the heat dissipation is better when sanding, providing fast and durable sanding, and the sand is not easy to fall off Application- Work with 100X915mm4x36 Inbelt sander, Suitable for various grinding applications, especially sanding and polishing harder metal, blade sharpening, widely used in machinery, metallurgy, leather, light industry, wood and metal products