Greenlee 745H-4 Knockout Punch/Die 4 in 10 ga SS

Greenlee 745H-4 knockout punch for stainless steel

The Greenlee 745H-4 is a four-piece knockout punch and die kit designed for electricians and panel builders who need to cut clean, round holes in enclosures. It works with battery-hydraulic or manual-hydraulic drivers and includes the punch, die and a 3/4 inch draw stud. The kit handles aluminium, brass, copper, fibreglass, mild steel, plastics and stainless steel up to 10 gauge thickness.

Sustained cutting in thick stainless steel

Under continuous hydraulic pressure the punch and die set produces a 4 27/50 inch diameter hole with a free-falling slug that clears the work area automatically. The hardened tool steel withstands repeated cycles in 10 gauge stainless steel without deformation, maintaining dimensional accuracy across multiple cutouts. The 5 1/2 inch draw stud length provides sufficient engagement for full stroke operation on standard hydraulic rams.

Transparent components simplify alignment

The transparent colour of the components allows visual confirmation of punch-to-die alignment before the stroke begins, reducing the risk of off-centre holes in expensive enclosure panels. The included draw stud mates directly with common hydraulic drivers, so no separate adapter purchase is required. The round punch shape suits standard conduit and cable-entry applications in industrial control cabinets.