【WRENCH SET】- 9-piece long arm hex key set for quickly tightening or loosening fasteners. Metric sizes. The hex key is made of chrome vanadium steel which has high hardness torque. Polished surface with double nickel chrome plating, also rustproof. 【9PCS TORX HEX SOCKET END WRENCHES】- Sizes included T10 (1.5mm), T15 (2mm), T20 (2.5mm), T25 (3mm), T27 (4mm), T30 (5mm), T40 (6mm), T45 (8mm) and T50 (10mm). For professionals (garages, workshops) as well as for amateurs for home assembly work. 【EXTRA LONG ARM】- Long allen keys save time in hard-to-reach and blind places. Different dimensions meet your different needs. And the hollow bottom design supports special torx screws with concave points at the bottom, such as removing or installing most Allen screws for cars, furniture and equipment. 【DURABLE】- Made of durable chrome vanadium steel for rugged strength and a corrosion-resistant satin finish. With CRV material, the hardness up to 56 degrees and the overall heat treatment are durable