String Fastener

This is a 3D printed drawstring bag fastener designed to replace on that broke on my sleeping bag. Because of this the bag constantly opened and I decided to 3D print one. I designed and printed this all in about 30 minutes. The spring used is a special spring I found lying around my garage but I will include the .stp files so that you can make the changes necessary for the spring you have on hand. This design worked really well and saved my some money from having to buy a fastener.