This is the solution for copying, transferring or laying out large complex curves. This is a large beefed-up version of a flexible curve. It’s a 32mm wide strip of spring steel with a series of linking plates and locking knobs on its rear face. Loosening the knobs allows you to bend the strip into position, tightening the knobs locks the curve in place. The minimum internal radius is 200mm, external 225mm, the length is 1,700mm(67").