High quality material This electric wiper adopts high quality material under noise and long light life and is not easily deforms large load capacity Fixed buckle and triangular support are used together and the arm has a strong load capacity of 660 pounds/300 kg wheel 180 The rotation range of the scaffolding is 180 and the arm is flexible in operation saving time and effort a good help for easy lifting scientific design The oscillating arm of the electric hoist has a reasonable design Most stable triangle with thick steel plate Solid structure The pieces are removable and easy to mount wide application adopts the integrated and suitable merger process for garages workshops