Use these Gen 7 Combat Application Tourniquets, otherwise known as Red Tip C.A.Ts, for stopping massive bleeding in emergency situations.
Red Tip C.A.Ts are easy to use, and can be applied with one hand. These tourniquets have saved many lives, and therefore should be in your emergency kit.
These C.A.Ts are standard issue for the US Military. Also, EMTs and law enforcement prefer this tactical tourniquet worldwide.
North American Rescue manufactures these tourniquets.