Wire brush is divided straight wire and curved wire. Straight wire is suitable for drilling and hair planting, such as wood wire brush, wire brush with wooden handle, disc wire brush, etc.; And the application scope of curved wire is basically applicable to each type of wire brush, in particular, spring steel wire brush roll is not a curved wire. If straight wire is used, the steel wire cannot be standardized and neat after being folded in half, however, due to its own bending degree, the curved wire can be relatively consistent with the nearby brush filaments during production, so even if the folded steel wire is asymmetric and slightly inclined, it cannot be seen, and the brush roll surface steel wire surrounded in this way is more dense, strong, and strong in rust removal and rebound.