【Premium Material】DISEN Allen Wrench Sets are made of high quality heat treated chrome vanadium steel for great hardness and durability, and finished with black oxide for anti-corrosion and rust prevention. Every hex key is stamped with size on the surface so that you can easily get the size you want 【Multiple Size Selection】DISEN 36 Pieces Allen Key Sets include SAE, Metric and Torx Star Sizes. SAE (13pc): 1/20, 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 3/16, 7/32, 1/4, 5/16, 3/8 inch. Metric (13pc): 1.27, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 8, 10mm. Torx Star (9pc): T10, T15, T20, T25, T27, T30, T40, T45, T50. And a T-handle 【T-Handle & Ball Head Design】DISEN Allen Key Set comes with a durable T-handle that allows you to apply torque to the wrench without hurting your fingers and add more torque strength. The chamfered edges and the long arm ball head design provide a 25-degree entry to the hard-to-access space 【Useful Tools】DISEN Allen Wrench Key Sets are useful hand tools and small enough to go into the tight space where traditional hex key can not reach. You can use them to easily tighten or loosen the bolt and nut, suitable for auto repair, DIY project, and household appliance maintenance 【Quality Guarantee】We assure you that every allen key has been tested strictly to meet the industrial standard of hardness and durability. They can last for a lifetime with normal use DISEN 36PC Allen Wrench Set, SAE & Metric Hex Key Set Torx Star Key Set, Long Arm Ball Head Design with T-Handle, Heat Treated Chrome Vanadium Steel