The Lisle manifold drill template, No. 71600, is designed to remove broken exhaust manifold bolts on Ford 4.6L, 5.4L, and 6.8L motors without damaging the cylinder head. Tapered bolts center the base plate over bolt holes and slip fit bushing allows you to move from hole to hole without moving the base plate. The screw extractor is then used to remove the broken bolt. Includes bushing to drill to tap size when extractor cannot be used. Dimensions are 19" width by 8.5" length by 2.25" depth.