Upgrade your keychain with 302SS flat-ground split rings!
The photo above is against and "inch" ruler but the actual manufactured sizes are metric. These split rings look a little nicer than a round ring and are made from corrosion resistance 302 stainless steel. Normal split rings are chrome plated carbon steel. Eventually the plating wears off and they can corrode if you live in a costal location.
People ask for these all the time, so I thought I'd give in and sweeten the deal with two additional sizes.
25 mm (1.0") : The 25mm split ring is the same one used on the Beta QRv2 flashlight and the Kappa QR Keychain.
20 mm (0.8") : This is a good option if you want to slim down your carry or only have a few items that need to go on the ring.
15 mm (0.6") : This ring is small and QUITE difficult to open. You'll find it nearly impossible to pass anything greater than .125" or 3mm onto the ring without ruining the spring tension. This is great if you have a specifc application where you need to attach 1 small item.