The Assenmacher Specialty Tools 14mm Bypass Wrench, No. BY14, is designed to access hard-to-reach Turbo bolts and nuts by maneuvering around obstructions that would typically be in the way. The BY14 is ideal for Volvo and Mack trucks, as well as other applications that require a 14mm wrench. It is made from forged steel and has a 3/8" drive. The tool is also available in 10mm (No. BY10) and 13mm (No. BY13) sizes.