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The combination of new tools, colour collocation more lively. From a more reasonable man-machine engineering to consider the design of the hammer, improved claw hammer head to pull up the Angle of the nail, and is more suitable for hand grip handle, more easy and comfortable. Auxiliary tools like a nail flexible small dice, add some fun to boring work environment. And solved when using positioning are not allowed to be at the same time, easy to be slanting. Because they don't need to assist with the hand, and then there will not be hit in one's hand.
Chengdu university of chengdu city, sichuan province of China