SHDIATOOL 2pcs 4inch Aluminum Base Back Pads for Polishing Pads Sanding Discs Abrasive Disc M14 Thread 100mm Backer Pad SHDIATOOL 2pcs 4inch Aluminum Base Back Pads for Polishing Pads Sanding Discs Abrasive Disc M14 Thread 100mm Backer Pad. Sale price : $15.76 Category : Tools