Model GB 4-tandem (2/6-tandem) bakin karfe mai sarrafa zazzabi mai sarrafa ganguna masu launi sun ƙunshi ƙananan ganguna huɗu ko biyu ko shida, waɗanda duk iri ɗaya ne don a iya yin gwaje-gwaje huɗu ko biyu ko shida a wani lokaci, don haka samun sakamako mafi kyau. An sanye shi da tsarin dumama dumama da tsarin kula da zafin jiki, ana iya sarrafa zafin jiki a so don biyan buƙatun aiki.A kayan aiki yana da ayyukan lokaci na sarrafa jimlar lokacin sake zagayowar aiki, gaba & tsawon juyawa na baya. Za'a iya daidaita saurin drum bisa ga buƙatar tsari. Tagar kallo an yi shi da cikakkiyar gilashi mai tauri don yanayin aiki na fata a cikin drum na iya zama bayyane a kallo. Duk wani ganga za a iya dakatar da shi a lokacin aiki na ganguna ta hanyar clutch system. Ana iya ciyar da ruwa ko fata a cikin ganguna a lokacin da ake aiki da ganguna ta hanyar ɗaukar kaya. Kayan aiki sun dace musamman don kwatanta gwajin fata daban-daban a cikin ƙananan nau'i da nau'in yin fata.
Wani muhimmin yanki na kayan aiki da ake amfani da shi sosai a masana'antar fatu, ganguna na katako tare da ginanniyar tashe-tashen hankula ko allunan fata. Ana iya sarrafa fata a lokaci guda a cikin batches a cikin ganga. Lokacin da kayan aikin ke motsa shi don juyawa, fata a cikin ganga yana jujjuya ci gaba da lankwasa, mikewa, bugun jini, motsawa da sauran ayyukan injina, wanda ke hanzarta aiwatar da aikin sinadarai kuma yana canza halayen fata. Kewayon aikace-aikacen drum ya ƙunshi mafi yawan hanyoyin sarrafa rigar na tanning, da bushewar laushi da bushewa, da dai sauransu.
