Hello, I found a similar wrench on AA, but they show it with XENEL on the shank (handle), This one does not have that marking. It does have 1/4 3/16 on one side of the heads, and BONNEY MADE IN U.S.A and 2551 on the other side of the heads. There is also a raised A.V. on the shank (handle) under the head with the Bonney label.Curious about the lack of the XENEL, and the date code, AA only shows a V. Overall length is 8". Thanks, Lou