Gardner Bender Knockout Converter, 3.5-in & 4-in

Gardner Bender Knockout Converter, 3.5-in & 4-in features:

• The converter eliminates the need for spaces and helps to center the hole.
• Versatile, durable and long lasting.
• Use the Knockout Converter whenever you need to create larger punch sizes (3.5 to 6 inch).
• Constructed from black oxide coated, hardened and tempered chrome-moly steel.
• Universal drawstud - interchangable with competitor parts.