Milescraft 1201 Base Plate/Bushing Set for Routers,Milescraft Inc.,1201" /> Durable guide bushings maintain consistent alignment with any router template shape TurnLock technology features fast tool free guide bushing exchanges on most routers Includes 8 common bushing sizes: 5/16, 3/8, 7/16. 1/2", 5/8, 51/64 and 7/16 & 5/8 extended nose Includes Top Hat adapter to convert other metal bushings into TurnLock quick change bushings Tough polycarbonate BasePlate can be modified with a drill or file to fit nonstandard routers