Leister Triac AT hot air tool has intelligent digital temperature control and blower speed control. This Leister TRIAC AT kit comes with a Pencil Tip nozzle and is an intelligent hot air tool used for TPO/PVC single-ply membrane welding, vinyl welding, overlap welding, draw welding, and stitching. The unit reaches temperatures automatically and voltage fluctuations are compensated. The Leister Triac AT hot air tool has adjustable heat from 104 degrees to 1148 degrees with air-flow control with a large digital display.