ProTech Razor Wire Skull TR-4 Limited EditionProTech TR4 LTD edition #107 200 Bruce Shaw silver skull inlay aluminum handle w 154CM blade (no box) $400 This limited edition TR 4 auto features a clear anodized aluminum handle with the black barb wire brick graphic along with a Bruce Shaw designed sterling silver skull. The durable 154CM blade comes with a gray DLC coating that provides a gratifying contrast to the detailed handle. This model is part of a serial numbered run of 200 knives.