Do it Standard Long Arm Hex Key Set, 13-Piece is crafted from high-quality chrome vanadium steel, ensuring durability and strength for all your fastening needs. Each key is hardened and tempered to provide a longer life, making this set a reliable choice for both professional and DIY projects. The set includes thirteen different sizes, ranging from .05" to 3/8", neatly organized in a reusable plastic holder for easy storage and portability. Whether you're working on small precision tasks or larger mechanical jobs, this hex key set versatility and convenience in one compact package. Model Number: 347531