20mm Snap Button Dies Hand Press Machine

["Easy to use: Snap button die is easy to install and does not require particularly complicated operations. Just press the bottom die and screw up the top die.","This listing includes only dies and dies can't use without a press machine.","The snap button dies set has 4 parts: 2 top dies and 2 bottom dies that are working together with a hand press snap machine.","The dies have a top thread size of 6.3 mm (1/4\") and bottom diameter size of 11.9 mm (1/2’’)","Before order please check your snap button's size."]