High Quality: Made of high quality chrome vanadium steel, high hardness, anti-corrosion and anti-rust, and after heat treatment has a higher hardness and resistance, can maintain stable performance in the work, is your first choice. Rich in size：The allen key set is available in sizes 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10 mm and in lengths from 62 to 175 mm, and each spanner is labelled so you can quickly find the size you need to get the job done quickly. Simple to Use: The ball end facilitates easy insertion into openings at an angle of approximately 30 degrees for a tighter fit and secure hold, the chamfered tip/end facilitates insertion into openings for easy work, even in confined or complex environments, and the spanner's high strength allows for the easy disassembly of parts and equipment. Easy to Identify: Each size of hexagonal wrench has a different colour, can quickly identify the specifications of the spanner, and then according to your size needs to quickly remember and find the spanner you need to improve work efficiency. Widely Used: The Allen Key Set with 9 different sizes for removing and installing cars, e-bikes, electrical appliances, toys and other mechanical devices, etc. Suitable for commercial use or occasional use to meet a variety of needs., Weight: 0.881849048 pounds, Manufacturer: Crozgan