Setha li-screw, e le karolo ea bohlokoa kopanong ea sejoale-joale ea mochini, li na le mefuta e mengata e fapaneng le mesebetsi e fapaneng. Har'a li-screw tse ngata tse behiloeng, li-screw tsa hexagon socket set li ratoa ke lienjiniere le litsebi bakeng sa moralo oa tsona o ikhethang le mefuta e mengata ea lisebelisoa. Kajeno, a re ke re shebisiseng litšobotsi, ditshebediso le ditemoso tsa hexagon socket set screws.