This profile has three openings for a fastener or accessory and one smooth side. Best suited when a clean look is needed on a single side. These versatile extrusions can be used for all kinds of structures. With their 40 mm base, they complement extrusions with 20, 30 and 50 mm bases perfectly. The base extrusion itself is extraordinarily sturdy and is hard to beat in terms of value for money. Suitable for bases, frames, enclosures, guarding and general-purpose applications.