Suitable for repairs on Bosch, Denso & Siemens injectors. 6.6, 7.6mm Hex security bits 20mm Hex/1/2" Sq Drive. 16mm Eight-sided socket for Bosch common rail Injectors. Denso common rail injector valve seat removal tool. Injector ball valve lapping tools & guide. Manufactured from Chrome Vanadium steel & S45C. Supplied in storage case.