Taparia 1170-6 Adjustable Spanner (Phosphate Finish) The item weighs 127 grams. 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.