The Mikk 200 Series ProKit Plus delivers unprecedented accuracy and repeated reliability in speeding the Extractorless removal of broken exhaust manifold mounting bolts in General Motors 2.8L, 3.5L, 3.7L, and 4.2L inline engines. Mikk ProKit Plus delivers speed, efficiency and utmost accuracy in drilling and subsequent assistance in the removal of the remaining portion of a damaged exhaust manifold mounting stud. There’s no need to use a center punch to mark the damaged stud. Since it can be mounted in any of eight orientations, accessing every single stud, the instrument is both versatile and universal. Mikki™ features two press fit hardened steel (Rc62) USA made for life drill bushings. This unique feature allows for piloting the drill precisely on the center and at right angles to the damaged stud. PROMAXX Tool machine-shop-grade drill bit tooling is specially engineered to close tolerances of (+) .000” and (-) .001” and ground straight to ensure accurate and repeatable results in using your new device. Specify PROMAXX® genuine replacement parts and tooling for optimum performance and extended warranty coverage. Always use appropriate OSHA-approved safety glasses/goggles and protective gloves while using this device and performing this operation.