Flexible Drill Bit Extension: It can be bending, turn round and rotated at many different angles; it can be drilled into a small space, in a variety of gaps, help you solve more problems quickly. Operating: The inner shaft has a wide range of rotation; when inside shaft rotates, the flexible black casing protects your hands from hurt, please keep the flexible drill not too high. Practicality: Flexible drill shaft head can be installed hexagonal handle (1/4 handle) head, mainly for computer stand, electrical cabinets, furniture, electrical appliances and any narrow space and other screwdriver. Applicability: Flexible shaft extension bits compatible with small spanners cordless screwdriver or low speed dc hand drill pneumatic screwdriver drill or electrical screwdriver. Flexible Screwdriver Extension: Note that it use a charging screwdriver or electrical drill (not for impact drills). If there is no turning adjustment, it is not suitable f