Weiler 7″ Maximum Density Crimped Wire Wheel Brush features increased fill density for greater brushing action, longer life and consistent performance in the most demanding applications requiring the flexibility of a crimped wire wheel. 5/8″-1/2″ arbor hole for use on bench/pedestal grinders. Increased fill density for greater brushing action. Consistent performance. Longer life in the most demanding applications requiring the flexibility of a crimped wire wheel. Tool: bench grinder and pedestal grinder. .