This is a new old stock extra length, single cutting edge, auger bit marked "JAMES SWAN CO. U.S.A. EXTRA " on the shank. This is a extra long, single lip pattern auger bit,designed to make a continuous chip in some types of wood. These are top quality auger bits from a retail store, left in hidden storage for many years. Each one measures (13.2" long overall x .94" diameter). This auger bit is marked 15 on the tapered square end shank. In fine, new old stock condition!