Lub laum chuck yog ib qho tshwj xeeb clamp uas yog siv los tuav lub rotating ntsis; vim qhov no, qee zaum nws yog hu ua tus tuav me ntsis. Hauv kev xyaum, chucks feem ntau muaj ob peb lub puab tsaig kom ruaj ntseg me ntsis. Hauv qee cov qauv, koj xav tau tus yuam sij chuck kom loosen lossis zawm lub chuck, cov no yog hu ua keyed chucks. Hauv lwm cov qauv, txawm li cas los xij, koj tsis xav tau tus yuam sij thiab tuaj yeem yooj yim loosen lossis zawm lub chuck los ntawm koj txhais tes, cov no yog hu ua keyless chucks. Yuav luag tag nrho cov cordless xyaum yog txawm peem rau nrog keyless chucks. Txawm hais tias ua hauj lwm nrog keyless chucks ntau dua vim lawv qhov yooj yim, keyed chucks muab kev ruaj ntseg ntau dua tshwj xeeb tshaj yog rau cov ntawv hnyav dua.