The product is a set of two OEM service manuals for CAT Caterpillar 773D and 775D mining trucks. These manuals cover topics related to excavation, grading, and site preparation. They provide detailed information on maintenance procedures, troubleshooting, and repairs for these specific models of Caterpillar trucks. This book set is a valuable resource for operators and maintenance personnel looking to keep these heavy equipment vehicles in optimal working condition. 2 Manuals included, in good shape. Thank you