Qee cov screws muaj lub taub hau tsim los kom haum rau ntau dua ib hom kev tsav tsheb, qee zaum hu ua combo-hau lossis combi-head. Feem ntau ntawm cov no yog kev sib txuam ntawm aslotted thiab Phillips taub hau, feem ntau siv nyob rau hauv txuas khawm rau cov rooj tog tub rau khoom rooj tog. Vim tias nws nthuav dav dav, tam sim no muaj cov neeg tsav tsheb tau ua tshwj xeeb rau hom ntsia hlau taub hau. Lwm yam kev sib xyaw ua ke yog Phillips thiab Robertson, Robertson thiab ib qho slotted, Torx thiab slotted thiab triple-tsav ntsia hlau uas tuaj yeem nqa ib qho slotted, Phillips lossis Robertson.
Sib xyaw ua ke slotted / pozidriv taub hau yog li ubiquitous hauv hluav taws xob switchgear kom tau khwv tau lub npe menyuam yaus" hluav taws xob' s screws" (tus thawj ntsia hlau tawm ntawm lub cuab yeej siv, thiab tus neeg siv tsis tas yuav nkim lub sijhawm nrhiav rau tus neeg tsav tsheb uas raug). Lawv txoj kev nce mus rau kev siv nrov tau tis rau qhov tseeb tias tsis yog tus ntsia hlau ntsia hlau loj lossis Pozidriv cov ntsia hlau kom zoo rau kev tsav tsheb cov screws mus rau qhov yuav tsum tau siv lub zog loj. Qee qhov chaw tsim khoom ntsia hlau ua kom muaj hau ntswj ntsia hlau thiab hu lawv" Modulo" ;," Ntxiv-rho tawm", lossis" tus tsim cov ntsia hlau ntsia hlau ntsia hlau" raug swb raws li tus saib xyuas cov ntsia hlau ntsia tsis muaj txiaj ntsig rau qhov tsis muaj cov sib xyaw taub hau. Slotted / Phillips (as txwv rau slotted / pozidriv) lub taub hau tshwm sim hauv qee qhov North American-ua switchgear