Quick-release medium plate. Gitzo's quick-release plates are available in three different profiles (A, B, and C). Each profile comes in various lengths (short or square, medium, and long) as well as with different features (graduated scale, anti-twist pin) and attachments (1/4 inch - 3/8 inch). In the new collection, Gitzo has combined some 1/4 inch and 3/8 inch mounting plates into a unique new code that includes two screws for both sizes (1/4 inch and 3/8 inch). Having two screws for each mounting size is ideal, especially with long plates when using heavy equipment or long lenses. As a general rule, the largest possible attachment should always be used. In any case, using the smaller screw always guarantees a high safety standard. In fact, all bolts and screws from Gitzo are made of high-quality steel.