We participated in the development of this tool with the New York City Fire Department - Research and Development Division. Our all-purpose head, aircraft steel shaft, chisel end, and celtex grips makes up this unit. The chisel end is used as a prying tool for scuttle hatches and roof doors. The short lengths are good for going up fire escapes and scuttles to the roof. Accept only aircraft steel for lightweight, but strong tool. Can also be ordered in fiberglass. SPECIFY. Ring added to chisel end is $15.00 extra. Comes in 3', 4', 5', 6', 8, 10'