Cobolt Drill Bit Set

This tool is a 10-piece screw extractor and left-hand drill bit set, essential for removing broken, stripped, or rusted fasteners like bolts and studs. It features five left-hand drill bits that create a pilot hole while rotating counter-clockwise (which can sometimes loosen the screw on its own) and five spiral-fluted extractors that grip into the hole to back out the damaged piece. Typically housed in a compact metal index case, this kit is a specialized problem-solver for automotive and mechanical repairs where standard tools cannot grip a damaged fastener.