Full channel pin type snap button ball cap type, ⼲ type, lock type, Mk1, root ⾯ ball cap, Tai Chi button, magnetic attachment. The precision accessory is the part connecting the false part and the true part. It is very delicate, but it is fine. The fixed ⽬ is realized by two interlocking parts on the false ⽛ and the sick ⾃. After wearing the dummy, just touch the precise connecting parts on the dummy and the base to lock the dummy on the base with a "click" sound, which is always firm. It is suitable for the lack of real pipes (lack of pipes) at the back end of the lack area, and the situation of adjacent pipes is better.