of teeth 38 and 40 attached to the device is a matter of design preference but two such teeth have found to be effective again the dimensions are given for illustrative purposes and not for specific limitations the tool portion 12 of the device shows that the lower edges 30 and 32 are beveled on the inside surface to facilitate hammering of the tool into the ground the handle portion 14 has upper end 46 and lower end 48 and is made of a length of pipe approximately nineteen inches long with a one eighth inch thick wall and a diameter of one and seven eighths inches the handle 14 is welded to the back of the tool portion as shown so that the handle is well secured to the tool portion a thick bottom slug 50 of metal is located and secured near the lower end 48 on the inside of the handle note that the lower end portion 52 of the handle between slug 50 and lower end 48 is crimped slightly since the slug forms the hammering surface by which the device is pounded into the ground a hammer bar generally designated by the number 60 is approximately five feet long and has elongated body 62 upper tapering end 64 and hammer end or head 66 which is of a slightly large diameter than the bar body 62 in use the device is placed next to a sign post or stub p which is typically a 4 by 4 wooden member such that the side walls 22 and 24 straddle the post hammer bar 60 is then inserted into the handle 14 and pounded down on the slug 50 until the lower ends of edges 30 and 32 are.