●For tightening flare nuts used in hydraulic piping in automobiles, general industrial machinery, etc. [ When using with the 9×12 preset torque wrench head exchangeable set ] ● Be sure to use the set with the included extension exchange head ( GX0912-E35 ) attached. [When using with DigiRatch and DigiRatch [Memork]] ● Please use the replacement head adapter ( GX13-A0917~A0920 ).