Chrome Molybdenum steel impact sockets with 1/2""Sq drive. Phosphate finish for added corrosion resistance. Suitable for use with any impact tool. Supplied in storage case. SEALEY PREMIER One of a comprehensive range of Premier Hand Tools, suitable for daily professional use. CHROME MOLYBDENUM STEEL For increased durability and strength. BLACK PHOSPHATE FINISH For added corrosion resistance. IMPACT GRADE - Suitable for use with any impact tool. 8PC SET - Contents: 1/4"", 5/16"", 3/8"", 7/16"", 1/2"", 9/16"", 5/8"", 3/4"". LENGTH 78mm. SUPPLIED IN STORAGE CASE For easy storage solutions. LIFETIME GUARANTEE*.