Hello, you are looking at a Caterpillar Cat 5P8690 Cam Follower Fixture Group 5P8691 Magnetic Spline Socket. Used on 5.4 bore engines 4 & 6 cylinder and 90 degree v8 to remove and install the valve adjuster gear. Has owner markings on it. It has been used but is in decent shape. Please see pictures for condition. Thank you for looking. Please check out my other auctions for more tools. The item “Caterpillar Cat 5P8690 Cam Follower Fixture Group 5P8691 Magnetic Spline Socket” is in sale since Friday, August 12, 2016. This item is in the category “Business & Industrial\Heavy Equipment Parts & Accs\Other Heavy Equip Parts & Accs”. The seller is “route82junk” and is located in New Boston, Texas. This item can be shipped to United States.