This presentation, the fifth of six parts on the practical analysis of significant properties of digital objects, seeks out tools capable of extracting and maintaining properties for an archival-scale number of objects. The presentation was given as part of module 3 of a 5-module course on digital preservation tools for repository managers, presented by the JISC KeepIt project. For more on this and other presentations in this course look for the tag 'KeepIt course' in the project blog http://blogs.ecs.soton.ac.uk/keepit/