Conical DEC (taemane e ntlafalitse compact), k'hamphani e hlahisa maqephe a sa hlophisehang a nang le libopeho le litlhaloso tse fapaneng joalo ka wedge, piramite e khutlo-tharo (piramite), khoune e nyane, Benz e khutlotharo, le sebopeho sa arc se bataletseng. Theknoloji ea mantlha ea letlapa la polycrystalline diamond composite e amoheloa, 'me sebopeho sa holim'a metsi se hatelloa le ho thehoa, se nang le sekhahla se bohale le moruo o molemo. E 'nile ea sebelisoa haholo masimong a ho cheka le a merafo a kang likotoana tsa daemane, li-roller cone, likotoana tsa merafo le mechine e pshatlang. Ka nako e ts'oanang, e loketse ka ho khetheha bakeng sa likarolo tse itseng tse sebetsang tsa PDC drill bits, tse kang meno a ka sehloohong / a thusang, meno a maholo a lekhalo, meno a mela ea bobeli, joalo-joalo.