Pneumatic punches, chisels, and hammers are used with a pneumatic tool. Many options are available including standard and heavy- duty shanks. They are coated with a black oxide finish for rust protection. Made in the USA. The Mayhew Tools 31989 ProPneumatic Heavy-Duty Cold Chisel, 3/4 x 7-1/2-Inch, features a 7-1/2-inch overall length, .498 Parker shank, and a 5/8-inch blade width. Founded in 1856, Mayhew Steel Products (Mayhew Tools) is the oldest punch and chisel manufacturer in the United States. As we’ve grown from a small tool house to the industry leader, there’s only one thing that hasn’t changed—our dedication to quality, reliability, and craftsmanship. That’s why we’ve become the tool of choice for certified technicians and professional mechanics across the country, and have found a home in the belts of do-it-yourselfers as well. Over time our product line has grown but our passion for manufacturing quality hand tools continues as we serve the Industrial, Automotive and Hardware industries. Mayhew is ISO 9001:2015 Certified.