Gufungura ubwoko bwimpumyi: ikoreshwa cyane kumasoko, hamwe nimpumyi zihumye.Muri byo, gufungura ubwoko bwa oblate buhumyi ni byo bikoreshwa cyane, kandi imitwe ihumye yumutwe ihumye ikwiranye nigihe gisaba gukora neza.

Gufunga impumyi zifunze: Ni rivet ihumye ifite capa ifunze rwose, idashobora kumeneka umwuka cyangwa amazi, kandi irashobora gukoreshwa mubidukikije bihujwe nibisabwa.