1.In the line when the erection or repair line, in the tower of wood ,Wang Tam ,copper and aluminum profiles on the board out of the hole required.
2.The use of leverage ,screm SHI LI,easy to operateand effort .The main use of alloy ,lightweight appearance.
3.In the absence of power supply construction and installation of office or in the high-altitude operationcan be described as handy ,irreplaceable ,light weightand easy to carry .