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™ Hook-&-Loop Disc Attachment - Over 35,000 long-life hooks ensure firm grip of disc, (up to 2x the standard number of hooks.) Random Orbit Sanding Action - Combination of pad orbit and rotation deliver well-blended, ultra-smooth finish with fast removal rate. Soft Microcellular Backing Pad - Pliable pad ensures a smooth, fine finish on flat or contoured surfaces. Integral Pad Dampening System - Pad braking system prevents swirl marks. Comfortable Soft-Grip Top and Body - Multiple grip positions to prevent hand fatigue. Low-Vibration Design - Engineered for smooth running and user comfort. Uses Industry-Standard 8-Hole 5 in Hook-&-Loop Discs - Compatible discs are widely available. Anti-Spillback Canister Design - Minimizes dust spillback into sander.