HAMMER BIT EASY TO SHRINK AND EXTEND

摘要

The present invention relates to a hammer bit which is easily shrunk and extended. The hammer bit includes a wing bit vertically and slantly moving in the housing bit engaged with a main body. A stopper protruding towards the outer upper side of the housing bit is formed in the wing bit so that the stopper is separated from or is connected to the outside of the housing bit when the wing bit moves. The hammer bit prevents the wing bit from being malfunctioned and simplifies a separation preventing structure of the wing bit.