Avenger Eye Coupler MP Clamp with 28 mm Spigot, 42-52 mm Ø. The Avenger C4461-1 LP MP Eye Coupler Grid Clamp comes with a 28 mm (1 1/8'') TV spigot. This popular MP cheeseboro clamp is commonly referred to as the Big Ben clamp. It has a wider range than the LP clamp and is ideal for many rigging systems, trusses, and entertainment configurations. The lower clamping jaw features a special flattened shape that aids in sizing this clamp and increases flexibility when securing various types of pipes. The MP eye clamp uses a wing nut with a washer and can clamp onto round tubes, trusses, or grids in a range of 42 mm to 52 mm, with a width of 50 mm. This clamp can support loads of up to 300 kilograms and is used in many demanding environments. TÜV and SÜD certified. Recommended accessories: C155, C155-01, E390, C460-1, C463-1, C4460-1, C464-1, E200, C4465-1, C464-1.