The construction couplers are widely used in the quenching process of wheel gear, the axial, the curve axle, the cam and the roller to improve their capacities in anti-abrasion and anti-crack. The major advantages of the coupler also include as there is no need to heating the whole body of the coupler, it has a small deformation ratio and small electricity consumption. In addition, it is easy to control as the surface quenching layer is adjustable according to real needs and requirements. The scaffolding coupler is equipped with quenching arts which can enable it to be much stronger in anti crack as there is a higher internal reacting compression force. These advantages of the scaffolding couplers China make it a best choice in the construction project, helping to cut down the working force cost and material needed. It can also help to shrink the operation and construction fees cost to make sure the running of the construction in a sound way.