20 Piece Hex Key Set In Metric And SAE Sizes This set includes 2 steel rings of hex keys- one in metric sizes and the other in SAE sizes Metric Sizes Include 1.5, 2, 2.5, 3, 3.5, 4, 5, 5.5, 6, And 8mm Sae Sizes Include 1/16, 5/64, 3/32, 1/8, 9/64, 5/32, 3/16, 7/32, 1/4 And 5/16 Inches These Key Are Made Of Sturdy Steel With A Black Oxide Finish Great For Repais On Bicycles, Motorcycles, Scooters, Roller Blades, Skate Boards, And More