6004 Joker VDE L VDE-insulated self-setting spannerApplication: Hexagonal screw heads and bolts with wrench sizes 16,0; 17,0; 18,0; 19,0 (metric) and 5 8"; 11 16"; 3 4" (imperial) Design: Insulated, individually tested as per IEC 60900; 2 component plastic foam insulation; self setting spanner with ratchet function; open end side adjustable in size, parallel smooth jaws; with 30 return angle via the corner width prisms in the jaws; anti slip protection at the front end of the handle; sliding function