This Steelman Hex Key Wrench Set features 13 of the most common standard sizes used to remove and install socket/allen headed fasteners on all of your home, automotive, and hobby projects. These wrenches are made with high strength, heat-treated chrome vanadium steel which is then coated with a protective black oxide finish. Each wrench has chamfered ends to make it easier to insert them into hex cap screws, bolts, and fasteners and their extended length driver shafts make it easy to reach into hard-to-access spaces. Their double-ended design allows you to choose between long reach and high torque for the job at hand. The hinged, red storage case has all sizes printed in high contrast white lettering which makes it easy to see and get the wrench you need.