Cobble knife sounds right I got one just like it on my coke machine in my store lobby here in Liberty hill. Pulled it out of a creek off the S. San Gabrial last month, mine came with two points, one reworked Ensor and a tiny Perd with a dull tip. Oh and an early 1970's hot wheel car. My Grandson adopted the car but I still have the points and the cobble knife. I saw your Banner Cornertang Drill from last year Wow ! Sweet find. Good luck hunting. Kris