Replacement locking ring to fit a 25 mm swivel clip into the webbing buckle. All my swivel clips on Shapeways come with this locking ring but if you have another generic clip you want to fit to a 25mm harness without having to unpick and resew the webbing this is what you need. Just break out the old lock ring from it's slot, pull put the broken swivel clip, fit new lock ring in to slot with large opening facing downward towards swivel clip. Push in new swivel clip. Done!
As this is a simple shape and PLA and ABS should be mechanically strong enough I will allow downloads of this part for home/ DIY printing.