It features (4) adjustable holders that move independently allowing the QT2 to grip virtually any form which is something other centering devises can't do. Even asymmetrical or multi-sided forms can be held securely. The plate is pre-drilled to fit on bat pins spaced 10" on center making it simple to install and remove as needed. Adjusting the Holders is also quick and easy dramatically reducing the time it takes to trim. The Quick Trim II 15 measures 23.5" in diameter and can hold pieces up to 18.75" across using the 1" Holders provided.