Feature●2 inch Roll Lock Surface Conditioning Quick Change Sanding Discs with Holder●Sanding Grade Coarse, Fine, Medium●Backing Material Strong Nylon Scrim Backing●Abrasive Material Aluminum Oxide●Attachment High Strength Plastic Roll Lock AttachmentDescription 2 inch Roll Lock Surface Conditioning Quick Change Sanding Discs with Holder, Sanding Grade Coarse, Fine, Medium, Backing Material Strong Nylon Scrim Backing, Abrasive Material Aluminum Oxide, Attachment High Strength Plastic Roll Lock Attachment