Single / Dual / square columns tower lifting machine lifting machine more stable base can be rotated one week to increase single-column lifting machine with 180-degree rotation, 360 degree rotation, small outdoor construction crane is 220 volts, wire rope length is 27 m, a diameter of 88mm material thickness 4mm steel bracket suitable for outdoor use, you need to press the counterweight, with brake clutch, air power outage protection, full copper motor. Square steel heavier type small lifting equipment, widely used in low-rise buildings, heavier type of square steel base and boom, more secure and stable, in order to achieve improved machine is powered, easy to use and flexible, the machine is power self-lock braking system, using more at ease, welcomed by users.