This ring/fork spanner set from Toolcraft is a high quality 8-piece set consisting the following parts: Wrench size 7.9mm (5/16in), 10mm (3/8in), 11.1mm (7/16in), 12.5mm (1/2in), 14.3mm (9/16in), 16mm (5/8in), 17.6mm (11/16in), 19mm (3/4in). * Inch-dimensions