DRA Ring Bit designed for repeated use is made of special steel by way of Roll Forging for a longer life span. CIP Ring Bit is made of rolled steel plate designed for midway life span though not as long as that of DRA Ring Bit. Disposable Ring Bit made of rolled steel plate has tips lesser in number and smaller in size but suitable for being thrown away by leaving behind deep in the ground with the pile after use. Ring for repeated use, Ring for couple of time's use and that foronly one time use are available according to the user's demand.We have on hand stock ranging from 406mm to 1220mm.