It replaces timber completely thus maintaining ecological balance, No wedging is required, Setting load can be provided, Installation is very easy, Dismantling is quick, Height variation is possible, Provides yielding characteristic, Easy withdrawal possible, even from a remote distance, All the parts are detachable thus easily transportable, Longevity of the prop by changing element(s) of yielding spring only, if required, Very compact and robust, Minimum maintenance, Very cost effective, thus economically viable, Roof load coming as well as convergence of the roof can be continuously monitored with the help of the pointer attached with the disc spring. Thus no separate measuring instrument is required for this purpose, Variable yielding range
, Simple, easy and safe remote release mechanism.