Aluminum alloy core, the badge die is equipped with carbon steel shell and aluminum alloy die core is characterized by good wear resistance, better hardness, and high efficiency. ABS sliding rail base,Constructed of premium ABS material, waterproof slide rail, resistant to acid & alkali for a more stable base When you need dies with other sizes you can replace them easily with this slide rail Easy to assemble,With a top die two bottom dies and a location pen you can easily assemble a button die to make a variety of beautiful badges Superior pen spring Upgraded spring provides excellent pressure curve for easy operation And two position pens designed for fixing die to ensure stability and longevity Direct replacement,125 32mm 1.73"(44mm) / 2" (50mm) / 2.2"(56mm) / 2.3" (58mm) / 3" (75mm) button maker model compatible with red button badge maker. When die you break or need Different die sizes to make different badges, the model is the ideal choice to replace. Wide application