This catalog has illustrations of the various sweeps, furrowers, teeh, knives, hoes, deep tillage spikes, tool standards, blades and shovels available through Oliver. It gives a brief description (southwestern economy sweep has 2 holes on 2" centers for 7/16" plow bolts. 1 hole centered for 5/8" CGE bolt. Sweep angle 67 degrees stem angel 55 degrees) as well as part numbers and the size.