Lub grapple excavator yog ib hom kev siv tshuab hnyav-tseem hu ua claw-style excavator- feem ntau yog siv rau kev ua haujlwm xws li khawb, thauj khoom thiab tshem tawm, thiab kev rhuav tshem lub tsev. Nws muaj lub hauv paus thav duab, lub platform rotating, tus qauv ntauwd, kev ua haujlwm txuas (tshwj xeeb yog grapple), kev mus ncig, thiab kev tswj hluav taws xob.
Kev khiav hauj lwm grapple excavator yuav tsum muaj kev cob qhia ua haujlwm kom muaj kev nyab xeeb ntawm cov neeg ua haujlwm tsim kho. Cov neeg ua haujlwm yuav tsum tuav lub cev kom zoo thaum siv los tiv thaiv kev raug mob ntawm lawv txhais tes thiab ob txhais ceg. Kev tshuaj xyuas tsis tu ncua ntawm hydraulic, braking, thiab hluav taws xob tswj tshuab yog qhov tseem ceeb los xyuas kom meej tias lub tshuab tseem ua haujlwm zoo.