Daban -daban masu binciken hasken rana an tsara su tare da bututun ƙarfe daban -daban, yawanci a cikin murabba'i, madauwari, siffar octagonal. A matsayin muhimmin sashi na masu bin diddigin, murabba'i, madauwari, bututu mai dunƙule na octagonal yana buƙatar madaidaiciya da murdiya. Muna sarrafa madaidaicin girman girma da shimfidar shimfidar murɗaɗɗen murɗaɗɗen murƙushewa daga mahaɗin kayan, sannan a yanka kuma a murɗa murfin sau biyu bayan an gama samar da bututun ƙarfe. Daidaitawa don tabbatar da cewa samfuran mu sun cika buƙatun zane.

Kayan bututu yawanci Q355 ko 355. A cewar abokin ciniki