High quality, industrial grade professional tool; Made with proprietary alloy steel, heat treated for optimal strength and ductility with black finish to resist rust; Set includes: .05", 1/16", 5/65", 3/32", 7/64", 1/8", 9/64", 5/32", 3/16", 7/32", 1/4", 5/16", 3/8". Made in USA
