The Milwaukee 49-16-2695 M18™ EXACT™ Knockout Set punches 2-1/2" to 4" holes in both mild and stainless steel up to 10 ga. Features include engraved crosshairs on the dies for precise alignment, optimal slug removal ports, and large size ID markings for easy punch and die selection. These punches and dies do not require spacers, enhancing efficiency on the job site.