The Mayhew 25017 Pilot Punch, 3mm has an original Mayhew patented design with a rounded end that fits snugly within a roll pin. Also known as a roll pin punch. Used to drive in and remove roll pins or other hollow tension pins. Made in the USA. OAL: 4-Inch, body size: 1/4-Inch, body type: Round, blade width: 3mm, and weight: 0.04-pound. Mayhew stands for quality, dependability, and confidence. When the caliber of the tools is just as important as the skills of the professionals employed, businesses trust Mayhew to get the job done. 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.