【WRENCH SET】- Set of 9 long arm hex keys for quickly tightening or loosening fasteners. Metric sizes. The hex key is made of chrome vanadium steel with high torque hardness. Polished surface with double chrome nickel plating, also rustproof. 【9pcs Hollow Key Torx Hex Keys】- 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 laypeople for assembly work at home. 【EXTRA LONG ARM】- Long Allen keys save time in hard-to-reach places and blind. Different dimensions meet your different needs. And the hollow bottom design supports special Torx screws with concave tips on the bottom, such as removing or installing most Allen screws for cars, furniture and appliances. 【DURABLE】- Made of durable chrome vanadium steel for robust strength and a corrosion-resistant satin finish. With CRV material, hardness up to 56 degrees and overall heat treatment, durable and strong. 【EASY