Strong Carabiner

thingiverse

Here is an ergonomically curved carabiner that packs a punch. The stronger b8 version is where it's at, and scaling down the b7 version to 80% makes it perfect for a key ring. This FDM gate concept was first unleashed on thingiverse by ddf3d.com. The basic idea revolves around the same principle as a standard wire gate climbing carabiner - two pivot points come together to create that all-important spring action. No branding in sight, and Solidworks files are included for your convenience. Printed with 7 perimeters for maximum strength. Check out the image of the pla b8 version holding down a 40 lb car battery like it's nothing. Just remember, this is not intended for critical applications.