Baum Tools B4500 Multi-Lock 2 Universal Twin and Quad Camshaft Lock is used to hold camshafts in place during timing belt removal and installation. Works on vehicles that have both camshaft sprockets next to each other. 2 B4500 are needed to lock both banks on a V engine with DOHC (quad cams). El Paso Tools ships items promptly and with the fastest method possible. Our policy is to ship orders that total $100.00 and more with signature required.