Greenlee Slug-Buster 7238SB Manual Knockout Punch Die Kit, 10 ga Capacity, For Use With Battery Powered/Hydraulic Ratchet Driver and 3/8 in and 3/4 in Draw Stud, 1/2 to 2 in Conduit/Pipe, Mild Steel
Milwaukee M18 Force Logic Knockout Punch Driver
Greenlee Manual Knockout Punch Set 7238SB from Greenlee - Acme Tools
Central Manual Knockout Punch Kit for sale online | eBay
iGeelee Portable Knockout Punch Kit CC-60 range from 1/2 to 2 inch, with dies of 1/2", 3/4", 1", 1 1/4", 1 1/2", 2"