The Mayhew pneumatic pilot punch is used to drive in and remove roll pins or other hollow tension pins. An original Mayhew patented design with a rounded end that fits snugly within a roll pin. 0. 401 shank. Made in the USA. 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.