Toughquip is the preeminent Heavy Equipment Information Guide, available online, for anyone seeking information on heavy equipment which includes an Engine Casting ID Directory, SAE Standard Flywheel Housing Specifications, and Engine and Allison Transmission Shipping Information.The Toughquip Guide efficiently allows buyers and sellers the ability to find serial numbers on equipment from 1960 to 2010, heavy equipment specifications, country of origin, transportation specifications, upgrade, and an engine guide. Everything you need to buy, sell and ship equipment can be found in the Toughquip Equipment Guide.Toughquip Information Guide is available two ways. We offer a free online version that is a sampling of our paid subscription guide which provides information on 3 manufacturers and approximately 4,500 pieces of equipment through 2008. Our full subscription online guide provides access to over 15,000 pieces of equipment and 60 manufacturers through 2011. Both of these versions are updated monthly.