1. The advantage of triangular metal shrapnel is that it can have the maximum force under the same diameter, such as those greater than 600gf, which is the advantage of this series of shrapnel. It is used in special occasions, such as requiring strong pressure to conduct to avoid manual misoperation. The conventional size of this triangular fragment ranges from 5-12mm, and the strength generally ranges from 150gf to 6000gf. Especially suitable for industrial control, high pressure/high temperature and other special instrument panels or control panels. 2. Triangle shrapnel products can be made with two feet, also known as positioning feet or fixed feet. The foot width is generally 0.8mm, and there are also specifications such as 0.7-1.0mm; There are three types of foot length: short foot, 0.8mm long; Middle foot: 1.5mm long and long foot: 3.0mm long or longer. By relying on two feet, it is easy to locate on the PCB board, eliminating the need for welding or surface coating.