Greenlee - 2.914 Inch Hole Diameter x 2-1/2 Inch Hole Length x Round, Knockout Punch Unit - 58423419 - MSC Industrial Supply

XHC-2145 Heavy Duty 2 Hole Paper Punch, 145 sheet punch capacity

Cutters – USA Buttons

Punch Circle Cutter for the Model 250 MX 2 1/2” – Buttonsonline

General Tools 1271ST 7 Piece Arch Punch Set

Hole Punch 2 Reach 1/4 inch Single Hole Punch,Heavy Duty Hole Puncher Single,Paper Punch Portable Hand Held Long Hole Punch for Paper Cards Plastic Cardboard (Silver) (1/4-6mm Hole) - Yahoo Shopping

VEVOR Hydraulic Knockout Punch Set, 98KN(10 T) Knockout Hole Punch Driver Kit, 6 Dies Ranging from 1/2 to 2 inch, for Punching Hole on the Switchboard, Steel Plate, Electrical Cabinet

General Tools 1280M Hollow Steel Punch, 1/2 in

General Tools 1271E Arch Punch, Silver, 1/2-Inches

EK Tools Circle Punch, 0.50-Inch

Klein Tools 53857 1.951 Knockout Punch, 1-1/2 Conduit