Features and Benefits:Dynabrade® Contact Arm Assembly measuring 3/4" X 5/8" includes a rubber wheel and a 3/4" wide platen pad that are suitable to use with 5/8" X 18" L belts. Arm assembly finds application in grinding, sanding works and is compatible with dynafile® II and electric dynafile® II. It can be use on metal, plastic, fiberglass, composites, rubber, glass, stone. It has belt tracking and patented design that can be used on coated abrasive, abrasive impregnated non-woven nylon and cloth polishing belts. It features an unique offset design that helps to ensure easy strap polishing with its arm.IncludesContact wheel assembly, platen pad