【9 PCS Allen Keys】9-piece Allen key set, high-quality materials, made of hardened and heat-treated chrome-vanadium steel 【Multiple Sizes】1.5,2,2.5,3,4,5,6,8,10 mm. Length: 90-233mm 【Reasonable Design】- Our allen key set is equipped with a ball joint up to 30 degrees of tilt to carry out even difficult precision engineering, watchmaking or model making jobs. 【Unique Design】 This 9-piece colored hex key set has a color-coded rubber coating, very convenient to use and facilitates quick identification of specifications, helps reduce fatigue and improve productivity. 【Widely Used】 Allen key set has a clearly visible size mark for quick size selection, good for DIY repairs of electronics, bicycles, electrical work, machinery, cars and motorcycles.