The Black Diamond C4 Camalot is a climbing cam for trad, big wall, and alpine climbing. The C4 offers the widest range of sizes in the Black Diamond collection of cams. The double-axle allows them to expand with a wider range than a single-axle unit, so you can take on more rock with less. The color coded Dyneema slings make grabbing them off your rack quick and simple. The Camalot is not the same as Camelot, no King Arthur to be found around here.