Abstract: A locking system with a quick-release mechanism for mounting an article or the like is disclosed. The locking system may generally comprise (a) a mounting plate, (b) a main shaft, (c) clutch, (d) a locking member, and (e) a covering cap. The mounting plate is provided with a central cavity at the centre thereof. The circumferential edge of the central cavity is formed into conical surface and a plurality of locking grooves. The mounting plate can be fastened onto any gadget that is to be mounted onto a support. A case for handphone is to be mounted on to a support by using the locking system of the present invention. The mounting plate is fastened onto the handphone case at the rear surface of a phone by inserting the mounting plate to a prefabricated hole at the back of the handphone case.