Kangto developed a non-hydraulic clamp on our own, which is different from the existing hydraulic clamp. The non-hydraulic clamp that we developed does not use hydraulic oil, helping prevent minor faults and has been recognized as an environmentally friendly product. The open width of the clamp is maximized while, when it comes to the thickness of the clamp that has to bear heavy weight, that of the steel plate used for the quick coulpler is applied.