1.Universally dakọtara akwa ụlọ ọgwụ.
2.Smooth elu.
3.Made nke elu-ike engineering plastic ihe na-adịgide adịgide na ike.
4.Hand crank nwere ike apịaji
Ọrụ 3.Self-Protecive mgbe kposara na-aga n'elu.
4.Joint nkwado na-mere elu ike metal alloy ihe, strudy na burable.