Features: Manufactured from Chrome Vanadium Steel for strength and durability Doubled ended - one ring end and one open end Ring end useful in restricted areas Open end ideal for greater leverage Fully polished finish to help resist corrosion Supplied in a tool roll for easy storage Specification: Whitworth sizes: 1/8”, 3/16”, ¼”. 5/16”, 3/8”, 7/16”, ½”, 9/16”, 5/8”, 11/16”