Specialist liner starts out as a 45 ounce block of C10-18 cold rolled steel, which we machine to our exacting cutback liner specifications. By compacting the geometry of the frame, it allows us to run a shorter front spring. With the shorter, tighter spring set up, the machine can be run quicker, resulting in a liner that produces, longer, smoother line work. Black oxide finish, your choice of 8 or 10 wrap coils. We set up the Specialist to be the perfect three to five liner.