Application Designed to remove broken exhaust manifold studs on 4.6L, 5.4L 2 valve, 5.4L 3 valve and 6.8L v10 Ford engines without damaging the block. Easy to Use Remove broken exhaust manifold studs on 4.6L, 5.4L and 6.8L V10 2 and 3 valve. Interchangeable plates and alignment pins help center drill on the broken stud. Depth gauge for drilling is marked on the template, the stud extractor is then used to remove the broken stud. Superior Material Made of premium grade steel and aluminum alloy, for great strength, reliability, excellent wear resistance, and long service life. Manufactured to OEM specification, meet or even exceed OEM specifications. .