Made in America - High quality, Industrial Grade Professional Tools made in the U.S.A. Contains inch Sizes: 3/32, 7/64, 1/8 , 9/64, 5/32, 3/16, 7/32, & 1/4 Eklind hex keys (allen wrenches) are used to drive internal hexagon socket (allen head) fasteners Optimum strength - These EKLIND tools are made with EKLIND Alloy Steel that is heat treated, quenched and tempered for optimum strength, torque and ductility for safety and coated with a rust resistant finish