Ezi zixhobo zokuphela kwebhola ze-carbide zine-stub flute ubude (1.5xD), ezimbini, ezintathu, okanye ezine ezinqamlekileyo, kunye neziko lokusika i-radius epheleleyo okanye "ibhola" ekupheleni.Zifumaneka kwiijometri zenjongo ngokubanzi kunye noyilo lwentsebenzo ephezulu.