The Kincrome reversible gear spanner has all the benefits of standard spanners and more. The strong fine gear ratcheting ring end needs as little as 2.5 of sweep to move the fastener, a standard fixed ring end needs a minimum of 30, or 12 times the area. Kincrome Gear Spanner ratcheting ring end has a Peripheral Drive configuration that virtually eliminates the rounding off of fasteners. The market leading narrow and thin head, combined with fine gear tooth design makes the Kincrome gear spanner suitable for working in tight and hard to access areas where a ratchet and socket will not fit. The reversible mechanism allows you to change the direction of the gears via the switch, and the 13 offset mimics the characteristics of a conventional combination spanner.