Punch Size: 3/16″(5mm), 1/4″(6mm), 5/16″(8mm), 3/8″(10mm), 7/16″(11mm), 1/2″(13mm), 5/8″(16mm), 3/4″(19mm), 7/8″(22mm), 1″(25mm), 1-1/8″(28mm), 1-1/4″(32mm), 1-3/8″(35mm). >>Spring-Loaded Punch Shaft: Retracts automatically into the handle when punching holes.