"This 14-piece hexagon key set is a handy tool to have in your toolkit for a variety of tasks. The keys are heat treated, which makes them more durable and resistant to wear and tear. The set includes a range of sizes, allowing you to choose the right key for the job at hand. Hexagon keys, also known as Allen keys, are used to loosen or tighten bolts and screws with a hexagonal socket. They are often used in automotive and mechanical work, as well as in furniture assembly and other tasks. Whether you are a professional mechanic or a DIY enthusiast, this hexagon key set is a useful tool to have on hand for a variety of tasks. Sizes: 7 x AF 1/16” 5/64” 3/32” 1/8” 5/32” 3/16” & 7/32” 7 x Metric 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5.5mm & 6mm"