About the item:30-PIECE COMBO SET - Great combination hex key set that includes 15 short arm hex drivers for metric hex screws and 15 long arm imperial (inch) hex fasteners.HIGH QUALITY STEEL - Allen keys made with chrome vanadium steel for durability with rust resistant black oxide coat.Consistent accurate fit for long life.STORAGE CASE - Sturdy carry case with marked slots.High-visibility sizes marked on each wrench and sturdy carrying case for fast size selection and easy organization.ACCURATE CHAMFERING - Carefully crafted with six sided chamfered ends to insert smoothly into fastener head,while ensuring a secure fit in even the smallest hex head requirements. Features:Package dimensions：8X5X2 INCHPackage weight：1.5lbLong Arm SAE Sizes Include:0.028", 0.035", 1/2", 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 3/16", 7/32", 1/4", 5/16" and 3/8" Short Arm Metric Sizes Include:0.7mm, 0.9mm, 1.3mm, 1.5mm, 2mm, 2.5mm 3mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 7mm, 8mm and 10mm Includes:15 SAE Long Arm Allen Wrenches (1 of Each Size)15 Metric Short Arm Allen Wrenches (1 of Each Size)1 Durable and Convenient Carrying Storage Case