Mayhew Pro 10212 3/4-Inch Black Oxide Cold Chisel Used to cut and shape metals softer than the cutting edge of the chisel Cutting edge angle designed to provide greater strength meets or exceeds ASME B107_401 and US govt GGG-C-313D Made in the USA. Lifetime Warranty. Made of alloy steel and heat treated for long life Used to cut and shape metals softer than the cutting edge of the chisel Cutting edge angle designed to provide greater strength Not intended to be used on masonry materials Unlimited Lifetime Warranty Made in the USA