The nine piece Hex Kit is a professional quality set of hex keys (Allen Wrenches) ideal for bike shop use or the home mechanic. Each bit is formed from high strength, extremely hard chrome-vanadium steel and treated with a super durable chrome finish. The holder folds open for easier access to the tools and it has built in holes for hanging. The set includes a 1.5, 2, 2.5, 3, 4, 5, 6, 8 and 10 mm L-shaped bit with a spherical tip and each are precision made for the best possible tolerance.