Atoplee 1pc 1/4 inch Quick Change Screwdriver Flexible Shaft Extension Bit Holder,11 inch Long For the position where common screwdriver can't work. Widely used in narrow space, can be bent, suitable for manual, electric, pneumatic screwdriver. Applicable to all electric drill and spanner,the head is provided with a locking function, and the magnetic device, ensure the sleeve will not fall. Loading or unloading the screws in the narrow place in the car engine easily. Can be connected with the electric drill or soanner to use it in somewhere it can't be used.