T-handle hex key set includes: 5/64" - 3/32" - 1/8" - 3/16" - 5/32" - 7/32" - 1/4" - 5/16" - 3/8" The allen wrenches are made with S2 steel for maximum strength and durability, and to resist rotational distortion. Wrenches can be used as short or long arm, providing access in all situations. You can maintain stability, allowing quicker screwing-unscrewing. Ball end design provides increased access, increasing entry angle to 25°. Chamfered edges on both ends help guide the key into the fastener smoothly and quickly. T Handles with ergonomic design offers a comfort grip for non-slip use and greater torque. 9PC T Handle Allen Wrench Set Ball End, Long Arm T Handle Hex Key Set, SAE 5/64 - 3/8 inch, S2 Steel