Semicircular design for tight corners: specially designed for sanding internal corners, curves, edges and moldings; ideal for drywall corners, fine woodworking and detailed finishing Multi-grit replaceable sandpaper: includes 3 grit options (180, 240, 320) for handling various materials such as wood, plastic, drywall and metal; easy to replace and reusable for extended use COMFORTABLE NON-SLIP HANDLE - Ergonomic design provides a firm grip and reduces hand fatigue; allows for better control and accuracy during complex sanding tasks SELF ADHESIVE BAND PAD SYSTEM - Simplify sandpaper replacement with a quick fix backing; keeps sandpaper in place during use for consistent performance LIGHTWEIGHT & TOOLBOX FRIENDLY - Compact and portable (4.3 x 8.7 x 4.3 inches); Lightweight ABS plastic body fits easily into tool boxes or belts for convenient use at home or on construction sites