High quality slim style Chrome Vanadium steel spanners. Hardened, tempered with a polished mirror finish for corrosion resistance. 144-Tooth WallDrive ratchet ring giving ultra-smooth action, requiring only 2.5° rotation to pick up the next tooth. Covers sizes 10 to 19mm. Open-end of the spanners have hex profiles with serrated jaws for extra grip. Supplied in storage/carry rack. Features: One of a comprehensive range of Premier Hand Tools, suitable for daily professional use High quality slim style Chrome Vanadium steel spanners Hardened, tempered with a mirror polished finish for corrosion resistance 144-Tooth WallDrive ratchet ring giving ultra-smooth action, requiring only 2.5° rotation to pick up the next tooth Sizes: 10, 11, 12, 13, 14, 15, 16, 17, 18, 19mm Open-end of the spanners have hex profiles which features serrated jaws for extra grip Supplied in storage/carry rack Lifetime guarantee* Specifications: Guarantee:Life Model Number: AK63914