Hex Key Set Features 22 Sizes And A T-Handle Adapter: 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 3/16, 7/32, 1/4, 3/8-Inch, 1.5 Mm, 2 Mm, 2.5 Mm, 3 Mm, 4 Mm, 5 Mm, 6 Mm, 7 Mm, 8 Mm, 10 Mm, T-Handle Adapter Converts Metric And Sae Hex L-Keys Into T-Handles, Providing Better Grip And Greater Torque, Heat-Treated And Tempered Hex Keys For Added Strength And Durability, Rust Resistant Black Phosphate Coating On Every Key, Ball-End Hex Keys For Working At Angles Us To 25 Degrees, Secure Storage With Internal Locking Mechanism To Prevent Loss Of Keys, Twist-To-Lock Case For Hassle-Free Hex Key Removal, Cross-Compatible, Interlocking Cases For Sleek And Convenient Storage To Stack With Other Twist-To-Lock Cases