1/4in. x 5.5in. Half Round Nose Chisel Mayhew 1/4" x 5-1/2" half round nose chisel is made of alloy steel for strength and durability and coated with a black oxide finish for resistance against rust and corrosion. 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.