Made of durable stainless steel continuous ring, ideal for those of us who have more than average number of keys, large and wide, yet lightweight and easy to carry, equipped with 8 # .5 color S-Biners® stainless steel (4 non Rustproof, 4 black) so you can easily recognize keys at a glance. Or use an S-Biners to attach it to a belt loop, wallet strap, zip pull, or attach it to a second ring. The S-PINner quickly and safely removes and reconnects, making it easy to share keys with coworkers, servers, babysitters, or to take a single key with you when you are outside to run or ride. More can be requested separately; It can accommodate many of them.