You must order the corresponding pins to go with your plier, ie 1.25mm pins for the 1.25mm pliers, (different size pins and pliers are not interchangeable).
Beadsmith Metal Stamp Punch Design Stamping Tools Choose Design 5-6mm
Black Heavy Duty Metal Hole Punch 40 Sheet WX01236
3 mm Mini Hole Punch - Ergonomic Single Hole Punch for Paper & Metal, Ideal for
Leitz Nexxt Series WOW Metal Office Hole Punch Red 2-Hole 30 Sheet A4
Hole Punch Metal Hand Held One Single Hole Paper Puncher 6mm.
1pc Hole Punch Metal Hand Held One Single Hole Paper Puncher