Specifications: A pair of Japanese concentric ball pins are supplied as standard, and the use effect is good. It is made of thick metal strips, with a beautiful and clean appearance and fast heating dissipation, which is very suitable for mounting rechargeable batteries. The chuck can be extended and contracted by double springs, and each welding pen can be independently extended and contracted, and the strength is properly controlled, so it will not happen that the ordinary integrated spot welding cannot achieve the pressure balance of the two welding pins, the welding is not hard, the spark is large, and the work efficiency is inferior. Built-in process switch, provides one-handed operation, no longer requires foot pedal, so the working efficiency is greatly improved. When the hand uses the handle of pen type spot welding, the short muscles of the hand can touch a large area of the surface of the battery, and will not be tired due to the long process and heavy spot welding during long-term operation. Item Name: Spot Welding Material: Plastic, Metal Features: Safe, Durable, Flexible, Fast Heating Dissipation Size: 15.5cm x 4.5cm x 2.5cm/6.10" x 1.77" x 0.98" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. It is an integrated