SNAP POPPERS FIXING DIES: These dies have a screw upper thread size of 8mm / 0.8cm and bottom base size of 19mm / 1.9cm. These dies are of great use in fixing 10mm snap poppers into any fabric using the universal green hand press machine. (Green machine is NOT included in this pack) STRONG MATERIAL: This versatile die set is made up of iron which makes it durable, strong and sturdy for long term usage CONVENIENT TO USE: We provide excellent quality dies for long lasting purpose. Dies have a smooth finished surface and very easy to use SUITABLE FOR: These Dies are suitable for designing and decorating DIY projects, jackets, arts and crafts, leather, clothing, purses, bags etc. PLEASE NOTE: Package includes dies only. Green machine and snap poppers not included in this package