The weight of a fixed instrument is generally 2.3KG, and the rule of adding barbell pieces is that the inside is heavier than the outside, that is, the heavy ones are added on the inside and the light ones are added on the outside. Because the weight of the clip is 2.5 kg, it is necessary to add small barbell pieces of less than 2 kg and containing 2 kg on the outside of the clip, and each side is limited to one small barbell piece.

Most barbells in gymnasiums belong to standard barbells, but there are strict requirements for standard barbells in China. A standard barbell consists of a barbell bar, a barbell blade and a clip.