Accelerator wrenches are faster than conventional wrenches due to the open jaw design, which ensures rapid engagement of fastener without the need to remove the spanner from the nut. Easier to use in tight spaces and nickel chrome plating protects against corrosion. Set of 8 metric combination wrenches. Sizes. 8, 10, 11, 12, 13, 14, 15 and 16mm.