Here is a versatile solution to almost any slotting requirement. By changing the number of cutters used, the set will cut grooves from 1/8″ to 23/32″ wide. By changing the bearings, this set will cut three different depths (1/4″, 3/8″, 1/2″). Includes arbor, 3 bearings and 4 cutters. Use on hand-held and table-mounted routers.