I bought 100 V4A Steel washers for 10 Bucks. A Set of punch numbers from a Pleb for 15 Bucks and get a punching device and a storage for the washers out of a 3D Printer which cost me another 10 Bucks.
The Seedor is great, but if you canĀ“t affored it, the selfmade solution works great too.
In my case i just wanna help friends to make a real good backup of there seed without spending more money then theĀ“ve in there stack so far.
https://www.tinkercad.com/things/6LnKVMshm6o-soporte-para-fabricar-billetera-fria-con-arandelas-v3