① Widely usage applicable.
② No ground subside is appeared when dig hole on anchoring works.
③ If the anchoring will be on farmland or road, the anchoring area can be minimize.
④ Easy working making no noise and save the working time are possible.
⑤
Efficiency working at even narrow place is possible.
⑥ Easy removing by reverse turning with bar inserting on top ring is possible.
⑦ Applicable weight at general ground is 3,000kgf, But damp ground or mud are not applicable.