hello; a friend today gave me an odd jack hammer bit. it looks like a 6 inch wide by roughly 9 inches long by 1/4 inch thick shovel/spade. the bit is about 20 inches long. never seen a jack-hammer bit shaped like this. he also gave me a bit someone broke. 1-1/8 inch octagon shank, semi-chrome in appearance. anyone have any ideas what it would be good for? -- Terry L. Ridder ><>