Description Twist-Off Dust Canister - Durable, compact canister shows dust level and easily detaches Bosch Microfilter System - Optimal on-board system for filtering fine dust, traps particles as small as a 1"2 micron in diameter Hook-Tight(tm) Hook-&-Loop Disc Attachment - Over 3""000 long-life hooks ensure firm grip of disc, (up to 2x the standard number of hooks) Random Orbit Sanding Action Soft Microcellular Backing Pad Integral Pad Dampening System - Pad braking system prevents swirl marks Variable-Speed Dial - Allows match of speed to work piece and task Comfortable Soft-Grip Top and Body - Multiple grip positions to prevent hand fatigue Low-Vibration Design - Engineered for smooth running and user comfort Anti-Spillback Canister Design - Minimizes dust spillback into sander Uses Industry-Standard 8-Hole 5"; Hook-&-Loop Discs - Compatible discs are widely available