Imperial / AF Flexi Ratchet Spanner Set Fits UNF / unc threads Manufactured from chrome vanadium steel for strength and durability Flexible spanners so ideal for those awkward hard to reach nuts and bolts. 72 tooth ratchets so works in 5 degree increments ideal for working in confined spaces. Flexible through 180 degrees. Combination spanner set so one end open and one end closed. AF / Imperial Spanners Supplied in a blow molded case for easy storage and transportation. SET Includes; SIZES 1 x spanner 5/16" (total length 145mm) 1 x spanner 3/8" (total length 165mm) 1 x spanner 7/16" (total length 170mm) 1 x spanner 1/2" (total length 190mm) 1 x spanner 9/16" (total length 203mm) 1 x spanner 5/8" (total length 206mm) 1 x spanner 11/16" (total length 225mm) 1 x spanner 3/4" (total length 255mm)