The Turbo Roller Guide is a self-guiding attachment that fits both Triac ST and AT Heat Guns. Turbo Roller Guide regulates the height, pressure, and alignment of your heat gun to produce a consistently high-quality weld with ease. This self-guiding attachment guides the welder in grooves perfectly and allows for more consistent welds. Turbo Roller Guide only works with Turbo Universal Nozzle Tips. It allows you to due 20 lineal ft per minute with the Universal Turbo Tip. A definite fatigue saver!