DD Fasteners imapereka zomangira zolimba kwambiri komanso zopulumutsa mphamvu zobowola mchira ndi zomangira zokha. Mchira wobowola uli ndi ntchito yofulumira, yokhazikika komanso yabwino. Mchira wobowola ukhoza kubowola mosavuta m'mbale zachitsulo za 6mm ~ 9mm, ndipo #5 tail screw yoperekedwa ku chitsulo chooneka ngati H imatha kubowola mosavuta chitsulo chokhuthala cha 12.5mm mumasekondi 10.

Mitundu yonse ya zinthu zowononga zimagwirizana ndi muyezo waku Australia AS3566. Zomangira zake ndi chitsulo cha kaboni (waya wazinthu umachokera ku China Chitsulo). Moyo wautumiki wa screw screw wadutsa kuwunika kwa akatswiri apadziko lonse a SGS. Mayeso opopera mchere a wononga mchira wobowola amatha kupitilira maola 1000, ndipo kuyesa kwa mvula ya asidi kumatha kupitilira maola 15.

Heavy duty tail self-bowola zomangira zimatha kusunga mpaka 50% ya nthawi yobowola ndipo ndi njira yabwino kwambiri yopititsira patsogolo ntchito ndi chitetezo.

Kuti mudziwe zambiri, chonde onani patsamba lathu, khalani tcheru, Cheers
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