The launch of the Mark I Series introduced the Cam-Locking system and offered contractors a durable and virtually maintenance-free material locking method. The current version of the Mark I Series allows the same performance and longevity as the previous versions; and now includes the ability to use accessories like the TrimCutter and TrimFormer. Versatile in its ability to perform various complex bending profiles with ease. Go from bending simple flashing to intricate outside corner posts without making any adjustments to the bending brake.