Models include:
Colt Python; Code CX
Colt Python Trooper; Code PNX
Ruger Blackhawk; Code RBX
Ruger Blackhawk .357 Mag.; Code HNX (No Drill)
Ruger Single Six; Code SNX
Ruger Security Six; Code XNX
Dan Wesson up through .357 Mag; Code DNX (No Drill)
Smith and Wesson Pistol; Code KX
Smith and Wesson up through .357 Mag; Code KNX