The NEW CRAFTSMAN HEX KEY ALLEN WRENCH SET includes 40 pieces of SAE standard inch and metric MM allen/wrenches. Made by Craftsman, this set comes with a lifetime warranty and is designed for automotive use. With a mix of SAE and metric sizes, this set is perfect for a variety of applications. The set includes a range of drive types such as Hex/Allen, making it versatile for any professional or DIY mechanic.