DimensionSquare inside diameter 38 , 6 point 1 26mm, Square outside diameter 22mm0.86. 630 Stainless Steel This turbo van position sensor socket tool is made of 630 stainless steel, which has high strength, wear resistance, toughness, and corrosion resistance. After heat treatment on the surface, the hardness of the tool is greatly improved, extending its shelf life and making it a durable choice. Two Usage MethodsThis tool can be used with a 22mm wrench38 ratchet to disassemble and install the turbo van position sensor, providing clearance for the closed position of the sensor, making it easier to disassemble and install the turbo van position sensor that is difficult to access. Relative Part NumberTurbo Vane Position Sensor replace 12643471,98011739, 98061570, 12635324, 904235,7635270512. FitmentThis tool is suitable for dismantling the turbo vane position sensor socket tool of the current Duramax and Isuzu Fseries diesel engines in 2004.For Chevrolet C4500C5500 Kodiak submodel C4C042, C4C044, C4E042, C4E044, C4U042, C4V042 6.6L 20062009; Express 25003500 Base 6.6L 20062016; Express 4500 Base 6.6L 20092016; Silverado 25003500 HD 6.6L 20062019; Silverado 2500 3500 Classic 6.6L 2007. FitmentFits for GMC C4500 C5500 Topkick submodel C4C042, C4C044, C4E042, C4E044, C4U042, C4V042 6.6L 20062009, Savana 2500 3500 Base 6.6L 20062016; Savana 4500 Base 6.6L 20092016, Sierra 25003500 HD 6.6L 20062019, Sierra 2500 3500 Classic 6.6L 2007; For Hummer H1 Alpha 2006; For Workhorse LF72 Base DIESEL 20062011, R26 UFO DIESEL, V8 403CID 6.6L 6599cc 2009, Workhorse Custom Chassis W72 Base DIESEL 2007.