The Mayhew 66000 16 piece Hollow Punch Set (SAE) includes: 50500 - Handle and Centering Point, 50501 - 1/8-Inch Hollow Punch, 50502 - 3/16-Inch Hollow Punch, 50503 - 1/4-Inch Hollow Punch, 50504 - 5/16-Inch Hollow Punch, 50505 - 3/8-Inch Hollow Punch, 50506 - 7/16-Inch Hollow Punch, 50507 - 1/2-Inch Hollow Punch, 50508 - 9/16-Inch Hollow Punch, 50509 - 5/8-Inch Hollow Punch, 50510 - 3/4-Inch Hollow Punch, 50511 - 7/8-Inch Hollow Punch, 50512 - 1-Inch Hollow Punch, 50513 - 1-1/16-Inch Hollow Punch, 50514 - 1-1/8-Inch Hollow Punch, 50515 - 1-3/16-Inch Hollow Punch. Hollow punch is used to create precise gaskets and washers in softer materials; e.g. cloth, vinyl, leather, light sheet metal, and gasket material. Dual cutting heads allow the user to punch concentric circles in one strike. 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.