Injin cika mashin mai yana ba da mafita mai araha ga ƙananan 'yan kasuwa. Ana amfani da injin cika harsashi da hannu sosai don cike dukkan nau'ikan mai, irin su man lithium, man fetur na ma'adinai, man nauyi, man ruwa, man shafawa, man shafawa, man shafawa mai ɗaukar nauyi, man shafawa mai rikitarwa, farin/mai haske/man shafawa mai bule, da sauransu. Hakanan ya dace da silicone sealant, PU sealant, MS sealant, manne, butyl sealant, da sauransu.
A masana'antar kera kayayyaki ta duniya, ko dai a fannin nazarin injiniya na daidaito ne a Jamus, masana'antun yankin masana'antu a China, ko cibiyoyin kula da gyare-gyare a Brazil, cike man shafawa babban ƙalubale ne da aka saba fuskanta. A tsakiyar bunƙasar sarrafa kansa, injunan cika man shafawa na masana'antu masu sauƙi (wanda ainihin shine nau'in piston mai atomatik) suna samun karɓuwa yayin da suke bayar da shawara ta musamman, suna zama mafita mafi dacewa ga kamfanoni masu aiki a duk faɗin duniya.
Maxwell ya aikata fa'idodin masana'antu a duk faɗin duniya, idan kuna buƙatar injin haɗin, masu don injunansu, ko mafita don layin samarwa, don Allah ku ji kyauta don tuntuɓar mu.