This is forklift-connected telescopic boom, used to lift stone slabs easily. It could be adjusted to total 5 scale choices to handle different weight in different situations.
This scissor type lifting clamp incorporates a latch that could releases the lifter by hand from the loading slab, once the load stone slab has been fully lowered to the ground. It helps transfer stone slabs or other sheet materials to target place in a safe and efficient way.