Heavy duty balanced ball bearing construction for vibration free performance. Built-in regulator for positive speed control. Positive grip handle and rubber housing for non-slip sanding. Balanced counterweight design provides orbital or rotary action. Applications: sanding, featheredging, scuffing, finishing and blending. Materials: metals, aluminium, ceramics, composites, stainless steel, wood working, plastics, fibreglass, stone and automotive body filler.