About This Item Perfect Fitment – Compatible with Detroit Diesel 60 Series engines found in Freightliner Coronado, Columbia, Century Class and many other trucks. Direct Replacement – Alternative to OEM part number J-46303 or J46303, engineered and improved to meet original part standards and performance. Easy Operation – This tool holds to the cam gear with an embedded magnet, which is convenient and time saving. Superior Construction – Built of high quality, heavy duty carbon steel that provides lasting performance, anti corrosion and impact resistant. .