This long arm metric key set is engineered for a precise fit and is ideal for deeply inset bolts. Manufactured from chrome vanadium steel that is hardened and tempered for strength and longevity. To help prevent corrosion, this key set has a polished chrome finish which is also powder-coated with a bright colour. Each colour signifies a different key size for easy identification. All tips have chamfered edges to eliminate burrs. Supplied in a fold-out easy-release storage holder to keep the key set organised and ready to use.