This product is used to be more effective, the low energy consumption and the use security, with the special potted component is the innovated new products as the decompression attachment. They will be more effective and reduces the energy consumption, easy take off the attachment and safer conveniently and is also more economic. Multiple card tenon, during the hauling, attachment is not easy to fall off, the non-barometric pressure thrust force installs under the condition to insert the male plug to reduce effort, to let you be more relaxed in the work. Finally, choosing right components will increase your work efficiency. A lot of options