Ideal for cutting, scraping or removing metal softer than the cutting edge of the chisel cutting edge angle designed to provide greater strength not intended to be used on masonry materials black oxide finish american made product 7/8 x 7-1/2 cold chisel has a black oxide finish to resist rust and corrosion and is manufactured of forged alloy steel for strength and durability. since 1856, our punches, chisels, and pry bars have been the go-to tools for oems and professional mechanics throughout the country. and while our company has grown to meet the needs of the professional market, as well as those of the do-it-yourself automotive enthusiast, our focus has never changed – leveraging our strength to build your business.