Edelrid's Bulletproof Carabiners

This is a brilliant idea which has been carried out to perfection by Edelrid. Carrying a couple of these as quickdraw sets when sport climbing will save wear on your rope and everyone else's lower-offs. As a belay karabiner the Bulletpoof is probably one of the best models out there, giving you everything you need in a more durable form while still retaining a reasonably light weight.