Knuckle ndi hinji yomwe gudumu limazungulira, nthawi zambiri imakhala ngati mphanda.Mafoloko apamwamba ndi apansi ali ndi mabowo awiri a kingpin, ndipo magazini ya knuckle imagwiritsidwa ntchito kukwera gudumu.Mitsempha iwiri ya mabowo a pini mu knuckle yowongolerera imalumikizidwa ku gawo lopangidwa ndi nkhonya kumbali zonse ziwiri za nsonga yakutsogolo kudzera pa kingpin, zomwe zimalola kuti gudumu lakutsogolo lipatutse kingpin pa Angle kuti ayendetse galimoto.Kuti muchepetse kuvala, chitsamba chamkuwa chimakanikizidwa mu dzenje la pini, ndipo mafuta opaka tchire amathiridwa ndi mafuta omwe amabadwira mumphuno woyikidwa pamphuno.Kuti chiwongolerocho chikhale chosinthika, mayendedwe amakonzedwa pakati pa thumba laling'ono lachitsulo chowongolera ndi nkhonya ya kutsogolo.Gasket yosinthira imaperekedwanso pakati pa khutu ndi nkhonya ya chiwongolero kuti musinthe kusiyana pakati pawo.
