Features and Benefits: High quality, industrial grade, professional set; Made with Eklindr Alloy Steel; Heat treated for optimum strength and ductility; Finished with Eklindr Black Finish to resist rust; Fold up sets include a variety of popular sizes in one convenient handle to keep you from losing individual keys; 8-Piece Folding Fractional SAE Hex Key Set 3/32-1/4 in.