These have 7075 hard anodized aluminum cores, titanium gates and scales, stainless black oxide hardware.
 
Carabiners sold as practical personal accessories are a dime-a-dozen, and like the majority of mainstream items, many are designed to fail. The Gatekeeper was designed to endure. Built in layers, it is unlike any other carabiner available. The main assembly consists of 19 pieces machined and cut to strict tolerances, then fastened together with 26 stainless steel machine screws. The final result is a solid piece of personal hardware that looks great and is almost impossible to put down. The GateKeeper is a premium carabiner.