2.Low center-of-gravity, strong rigidity, no impact, no noise, adjust the height of two-stage, standard electron, the hardware etc.

3.Rivet power (soft steel: solid 1-10mm, hollow 1-22mm, height of rivet (longest) can reach 150mm, depth of throat is 230mm), apply to riveting bicycle accessory, car accessory, tableware, making alloy ladder, leisure chair etc.