TECHNICAL SPECIFICATION: Forged from Chrome Vanadium Steel, Hardened and Tempered, Chrome Plated, Conforming to IS 2028-2004. The Double End Spanner, populary known as DOE spanner is a one-piece wrench with a U-shaped opening that grips two opposite faces of the bolt or nut. These spanners are usually Double-ended, with a different-sized opening at each end. The ends are generally oriented at an angle of around 15 degrees to the longitudinal axis of the handle. www.samsindusneeds.com stocks all metric sizes of the De Neers Double open end spanner with some great pricings. HSN CODE: 82041110.