Iqukethe i-back pad eguquguqukayo ehlukile evumela abasebenzisi ukuthi bakhethe uhla lokunyakaza olufanelana kahle nezidingo zabo ngokushintsha isikhundla sesandla esivundlile maqondana namahlombe. Lesi sici esiyingqayizivele, esihlanganiswe nokuhlangana kwengalo yokucindezela ohlangothini olulodwa kuma-degrees angu-20 ngaphezulu naphambi komsebenzisi kanye nezibambo ezimbili, sivumela uhla oluphelele lokuqeqeshwa kokunyakaza ngaphandle kokuthinta.
Isihlalo singalungiswa ngenkathi sihleli noma simile, futhi sisizwa ama-bearings nama-cylinder asezingeni eliphezulu ukuze kulungiswe okuzinzile nokungashayisani kahle.
Izingalo zokucindezela ohlangothini olulodwa zihlangana ngamadigri angu-20 ohlangothini ngalunye ngenhla naphambi kwamahlombe, okuvumela uhla oluphelele lokunyakaza ngaphandle kokuthinta.
Umhlane oguquguqukayo oyingqayizivele uvumela umsebenzisi ukuthi ashintshe indawo yesibambo namahlombe avundlile.