Adjustable spanner is Comes with a laser mark scale and black phosphate finish. Available in bright polished nickel chrome finish. Precision marked scale indicate correct jaw opening. Heat treated spanner wrench for home or commercial use. High quality tool for all relevant purposes. Long term Rust free. Easy to grip.The item Has got a "jaw" of adjustable width, allowing it to be used with different sizes of fastener head (nut, bolt, etc.) rather than just one fastener, as with a conventional fixed spanner. Has a fully polished chrome plated selected alloy which gives steel fully hardened and tempered effortless screw adjustment.