Kwindawo yokubhola ioyile kunye negesi, ukhetho lokubhola kudlala indima ebalulekileyo ekusebenzeni nokuphumelela. Esinye isixhobo esibalulekileyo yi-8 1/2 ye-intshi tricone bit. Olu hlobo lwe-bit lwenzelwe ngokukodwa ukuba lusetyenziswe kumatye ahlukeneyo kwaye lujongwa kakhulu ngokungafaniyo kwayo kunye nokusebenza kwemisebenzi yokubhola. I-tricone bit ine-cones ezintathu ezijikelezayo, iq