The alternator decoupler pulley tool kit includes all of the tools required for removal and installation of ADP (one way and overriding/freewheeling). This handy tool kit includes five tools designed for North American vehicles. 57610 33T Spline Pulley Socket 57630 17mm Pulley Socket 57670 10 mm Triple Square Shaft Bit 57620 10mm Female Hex Shaft Bit 57660 T-50 Shaft Bit * Lifetime Warranty