Application: Hexagon screw heads and bolts with wrench size 19, 0; 20, 0; 21, 0; 22, 0; 24, 0 (metric) and 3/4"; 25/32"; 13/16"; 7/8"; 15/16" (imperial) Design: Self-setting spanner with ratchet function; size-adjustable open end side, parallel smooth jaws; with 30deg return angle due to the corner-width rectangular prisms in the jaws; hole for hanging | Wera 6004 Joker XL Self-Setting Spanner Adjustable Wrench