MOTION PRO 14MM SPARK PLUG SOCKET Thin wall design allows For use in small plug cavities. Can be driven with 1/4 in. drive ratchet, 13MM or 14MM wrench, socket or T-handle. Rubber plug retainer. Designed For use on late model KTM 4-strokes, 2010 Honda CRF250R and 2009 CRF450R