Highly Durable Design: The shell of stud welder kit is made of high-quality ABS body, has good stability under high temperature conditions, withstand temperature of 93-118, and the movement is pure copper electrode. This welder stud kit is wear-resistant, strong and sturdy. Thermal Protection: The stud welder dent repair kit is designed with thermal protection function. When the temperature of the transformer reaches 95°C (203°F), the thermal protection function of the machine will work, providing long-term welding, security and higher efficiency. Heavy Duty Slide Hammer: The heavy-duty spot welder stud with quick-release chuck can hold the pin firmly without sliding, and its handle is made of vinyl, which is non-slip and can be held firmly. Also, the weight of the cast iron slide contributes to comfortable grip. One-handed Simple Operation: Adopts touch switch design, just press the trigger, then you can successfully weld the nails