Durable Construction: Made from rubber and aluminum for long-lasting use Compatible with Bosch Routers: Fits Bosch offsets up to 1 1/4 inch Quick and Easy Changeovers: Spring-loaded collet system allows fast collet changes Secure Fit: Tight grip on bits and collets for smooth operation Compact Design: Measures only 5 1/4 inches long for convenient storage Change your table-mounted router bits easily and comfortably with the Rockler Offset Router Collet Wrenches for Bosch routers. Both wrenches are offset by 1'', which lets them reach through the table opening from the top down. Simply remove the insert ring and lower the wrenches through the opening. The integral aluminum catches on the top wrench help to prevent the wrench from slipping off the collet nut while tightening or loosening. With no need to fumble around beneath the table surface, you'll enjoy far better visibility. And since you are not confined by the housing of the router, your hands will have much more room to work. Soft rubber grips are easy on your palms. Fits Bosch routers with 24mm and 16mm collet nuts.