Pocket saver 3D print model

If you have keys like the one in first picture, you probably have holes in your pockets. This little tube can save them. You will notice that the small spikes inside ensure that it will stay in place. I designed them big enough to be robust. and thin enough that they don’t wear out too quickly when you remove the key to open the door. I printed it using flexible filament, but you can use regular PLA. The spikes will just wear faster.