Application: Hexagon screw heads and bolts with wrench sizes 13, 0; 14, 0; 15, 0; 16, 0 and 16, 0; 17, 0; 18, 0; 19, 0 (metric) resp. 1/2"; 17/32"; 9/16", 19/32"; 5/8" and 5/8"; 11/16"; 3/4" (imperial) Design: Self-setting double spanner with ratchet functionality; jaws adjustable in size, parallel smooth jaws; with 30deg return angle via the corner-width prisms in the jaw | Wera 6006 Joker M/L Self-Setting Double Spanner Adjustable Wrench