Keyless locking bolt allows quick changing of pre-loaded sanding drums Multiple sanding sleeves in 13, 19, 26, 38mm diameters for use in a wide range of sanding tasks Dual action rotating and vertical oscillation movement for fast material removal and burn-free sanding Variable speed adjustment for precise control of the 18-32rpm Non-slip bench mat and inversion clamps converts the sander into an effective bench-mounted spindle sander, Weight: 4.850169764 Pounds, Manufacturer: Triton