Pali mitundu yambiri ya maunyolo, omwe amagawidwa kukhala mphete yowongoka, yooneka ngati D ndi ya akavalo molingana ndi mawonekedwe a mphete; pali mitundu iwiri ya wononga mtundu ndi kusintha pini mtundu malinga ndi kugwirizana mawonekedwe pini ndi mphete. Pini ndi mphete ya shackle ya screw ndi ulusi. Pali mitundu iwiri ya mapini mu unyolo, yomwe ndi yozungulira ndi yozungulira. Imalumikizana bwino ndi dzenje la mphete ndipo imatha kutulutsidwa mwachindunji. Shackle yamtundu wa D imagwiritsidwa ntchito makamaka polumikiza chingwe chimodzi; Shackle yamtundu wa B imagwiritsidwa ntchito kwambiri popanga miyendo yambiri. BW, DW maunyolo amtundu wa DW amagwiritsidwa ntchito makamaka pazochitika zomwe zida sizingayendetse tsinde la pini kuti lizizungulira; BX, DX maunyolo amtundu wa DX amagwiritsidwa ntchito makamaka panthawi yomwe shaft ya pini imatha kuzungulira ndikuyika kwa nthawi yayitali.
Shackle ndiye chida cholumikizira chomwe chimagwiritsidwa ntchito kwambiri pakukweza ntchito. Amagwiritsidwa ntchito kwambiri pazolumikizana zomwe nthawi zambiri zimayikidwa ndikuchotsedwa pakukweza. Pamene chingwecho chikugwiritsidwa ntchito pamodzi ndi mtengo, chingwecho chingagwiritsidwe ntchito pamwamba pazitsulo m'malo mwa mphete yokweza ndi mbale pansi pa mtengo. Kulumikizana kwa kukhazikitsa kosavuta ndikuchotsa. Ma shackles amagwiritsidwa ntchito kwambiri mumagetsi, mafuta, makina, mphamvu yamphepo, mafakitale amankhwala, madoko, zomangamanga ndi mafakitale ena, ndipo ndizofunikira kwambiri zolumikizirana pakukweza.
