FIT FOR: All kind of bolts & nuts, The wrench size can be extended from AN3-12. FUNCTION: They are the solution to your problems with taps,valves,pipes and piping,radiators boilers,wheels. ADVANTAGES: Particularly it is convinent to work in narrow spaces due to it is ergonomically designed. MADE OF: Constructed of aircraft grade material, polished and anodized for bright appearance and protection. But being made from aluminium these will not mark the fittings to keep your engine bay in show condition! Name:Adjustable Spanner Size: AN-3/-4/-6/-8/-10/-12/-16 Universal(AN-3 to AN-16) color:Black Material:Aluminum alloy Package Contents: 1 x Adjustable Wrench Spanner Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.