Manufactured from hardened and tempered Chrome Vanadium steel with a fully polished finish for corrosion resistance. Unique patented design enables a ratcheting action for quick and efficient work. Ideal for in-line applications such as brake pipe fittings. Works on rounded, worn and rusted nuts unlike other types of flare nut spanner which rely on the points of the hex being in good condition. Features one fixed and one flexi-end for ease of use.