Neiko Interchangeable 10-Piece Hollow Punch Set with Adjustable Center Pin For use on rubber, leather, copper, soft brass and other materials Comes with 10 interchangeable punch heads Includes Point Of Punch Shaft, Size: 3/16"(5mm), 1/4"(6.5mm), 5/16"(8mm) 3/8"(9.5mm), 1/2"(12.5mm), 5/8"(16mm), 25/82"(20mm), 1"(25.4mm), 1-1/4"(32mm) Blow molded storage case included