Iyo yakapetwa kaviri yekunze shinda yekudzikisa yakabatana inonziwo hexagonal kuderedza mubatanidzwa uye hexagonal yakarukwa mubatanidzwa.Ishanduro yekushanduka-shanduka yejoini yakaenzana yedhayamita yakarukwa.;Parizvino, saizi yatinogona kupa iri pakati pe1/4 inch uye 4 inch.