Hook-and-Loop Sanding Disc, Vacuum Hole Design No Hole, Disc Dia. 6 In., Grade Super Fine, 400 Grit, Abrasive Type Open Coat, Stearated, Abrasive Material Aluminum Oxide, Backing Material Paper, Backing Weight C, Color Yellow, Series A290, Package Quantity 100 Hook-and-Loop Paper DiscsHook-and-loop backing makes discs reusable and enables quick disc changes. Stearate coating reduces disc loading. Designed for use on random orbital and rotary sanders. Use for preparing primed and painted surfaces for finishing; stripping primer and paint; sanding plastic, fiberglass, and bare wood; light weld blending and deburring; and finishing all types of metal. Use with hook-and-loop back-up pads, sold separately.No-Fil Adalox A290Aluminum oxide abrasive provides consistent finishes. Heavy C-weight paper backing resists edge tearing. Use for all-purpose dry sanding and finishing applications.