FIAT Wheel Lock kit includes four locking bolts. Wheel Locks and exclusive FIAT key codes helps ensure maximum protection. Available in one- and/or two-piece styles, for both steel and aluminum wheels. Each Wheel Lock kit includes four or five chrome-plated locking bolts, and one exclusive FIAT key. Wheel Lock kits help protect against wheel and tire theft without affecting wheel balance., Wheel Locks, fits lug bolts, 17 mm hex head, 46 mm overall length, 21 mm thread length. For aluminum wheels only..