Set of 9 inch hex keys in sizes 1/16", 5/64", 3/32", 1/8", 5/32", 3/16", 1/4", 5/16", 3/8". TOPTUL tools are manufactured with the most demanding tasks in mind. Precisely selected materials, high precision workmanship, and resistance to deformation and cracking determine their great popularity and excellent reputation. Combined with exceptional surface finish and affordable price.