Msomali wamoto ndi mtundu wa msomali wopepuka wokhala ndi ma spacers ozungulira omwe amavuta kugwiritsa ntchito msomali.Ndi mtundu wa msomali wopanda ndodo wokhala ndi ma spacers ozungulira mosasamala.Zimaphatikizapo ndodo ya msomali ndi mutu wa msomali, pakati pa msomali wa msomali umayikidwa chotchinga champhamvu, chotchinga champhamvu ndi chathyathyathya cylindrical, m'mimba mwake wa chipika cha mphamvu ndi m'mimba mwake wa ndodo ya msomali, chipika champhamvu ndi mutu msomali olumikizidwa ndi yosalala pamwamba, mu ndodo msomali waikidwa ozungulira spacer, mu msomali ndodo pakati ozungulira spacer ndi msomali mutu waikidwa pulasitiki woyera mphete.