... more stable. THC key features as follow,A, Auto Initial Height Sensing(IHS)Torch Retaining Cap IHS and Proximity Switch IHS ... touches the workpiece, THC automatically lift torch up to IHS height. So with XPTHC-300, user no need to worry about ... torch head crashing.C, Freeze Auto Height Control on Corner SignalXPTHC-300 would freeze Auto Mode on ...