Provides positive lock throughout selected power settings by turning the chrome collet locking nut. Maximum travel is 3″. Requires 1/2″ panel mounting hole. Stainless steel 0.078 inner core with Teflon lines outer casing. Comes either 36″ or 96″ length. Customer cuts to desired finished length. Black knob. Knob diameter 1.35″ Not FAA Approved – for experimental use only.