The teeth attached to the jaw have some ingenuity, the size of the tooth is different between the root and the tip, and the root to which the force is more attached is larger than the tooth. The grip part is short and the screw that adjusts the opening width of the jaw gently turns, so every time you grasp, the screw slightly turns and needs fine adjustment. Although it may be individual differences, the item reached to us is out of alignment with the teeth of the tip, so we can not hold tight springs etc. firmly. Originally close to the base is important for applications such as turning rusted bolts, but in the case of long nose it is important that the finish near the tip is important. It was almost useless as our use.