12 Piece Jumbo Hex/ Allen Key Set 68196C Jumbo Hex/ Allen Key Set Made From Heat Treated Steel Black Oxide Finish. Perfect for that bigger machinery and marine industry This set weigh nearly 4 Kgs to help substantiate its quality and durability Specification AF Sizes 3/8 7/16 1/2 9/16 5/8 3/4 Metric Sizes 8mm 10mm 12mm 14mm 17mm 19 mm Sizes range from 120mm long for the smallest Allen key to 200mm long for the largest