The tool used to punch hammer eyes. This is used with a striker and is not a power hammer tool. Made to punch hammer eyes in sizes from about <1, to 5 lbs. A larger size is available for punching sledgehammer eyes from 6 to 16 lbs, as well as being suitable for punching axe eyes. Made with your choice of 4140 or 4340 alloy steel. Contact for questions, or check out the “FAQ” page.