An Alternator Pulley Remover Kit, specifically the Toptul JGAI1301 13-piece set, designed for the removal and installation of alternator freewheel drive pulleys. Description: Purpose: This kit facilitates the easy removal and replacement of alternator free-wheel drive pulleys, whether the alternator is on or off the vehicle. It allows the alternator shaft to be locked in place while the pulley's central locking bolt is released or tightened. Components: The kit typically includes various bits (Spline M8, M10; Star T40, T50; Hex 8, 10mm) and a reaction nut, all housed in a blow-molded plastic case for organization and transport. Applications: It is compatible with a wide range of vehicle makes, including BMW, VW, Audi, Mercedes, Renault, Ford, Porsche, and Fiat, among others. The tools are designed to work on both overriding alternator decoupler (OAD) and one-way clutch (OWC) pulleys. Material: The tools are generally made from high-quality, hardened, and tempered steel for durability.