DE-STA-CO toggle clamps are classified in Action Groups, Series and as Models. There are four basic Action Groups. A group is indicated by a three digit number (200's, 300's, 400's, 500's, 600's, 800's). Most Model numbers include on of these numbers together with a suffix of one or more letters.
All Series and Models in a group have the same general characteristics.
All letter suffixes refer to specific design features ans indicated in this chart.

KEY LETTER SUFFIXES
Various model-number suffixes - such as Model 207-UB - are used to help you visualize design characteristics. The key to these suffixes is in the following chart.