CTA Manufacturing (CTA2039) 12 Point Triple-Square "XZN" Tamper Proof Wrench, Stubby, 16mm
Features and Benefits: 2 piece design. Fits 1/2" square drive x 2-1/2" long. Service fasteners on VW, Audi, Porsche and some Detroit Diesel engines. 2 piece design for high torque applications, and precision machined for exact fit.