An adjustable spanner is an open-end wrench with a movable jaw, allowing it to be used with different sizes of fastener head (nut, bolt, etc.) rather than just one fastener size, as with a conventional fixed spanner.
A:Min Width Across Flats in closed condition 0mm. Max Width Across Flats in open condition 35mm. Length of jaws Minimum 28mm & Max 35mm. Thickness of jaws 15mm at base and 10mm at Apex.