CRB HAND WRAPPER: Spool Side Pressure System By putting pressure on the spool and not the thread you avoid the problems of the metallic treads de- laminating, nylon thread bunching and twist coiling. Dual Thread Tensioners Holding two spools means you can quickly change from color to color fast and efficiently. Smooth Thread Slider By putting pressure on the spool and not the thread you avoid the problems of the metallic treads de-laminating, nylon thread bunching and twist coiling. Thread Tension Rod Designed to keep constant thread tension on your wraps, cushion the tread spool pressure and allow you to reverse your wraps without losing tension on the thread.