Knockout Punches
Greenlee knockout punches for punching conduit size holes in fibreglass, aluminium, mild steel and plastic workpieces. These knockouts are suitable for use with hydraulic & battery powered drivers and feature carbon alloy steel construction for minimising wear over repeated usage. They are nickel plated for high abrasion resistance and selected models feature No-Thread punch design for eliminating chances of cross threading. Choose from a wide range of these knockout punches, available in 7/8, 1-7/32, 2-7/8, 3-1/2, 4-1/2 & 4 inch hole sizes.