This larger Aero cleat has a roller fairlead to allow a triangular rig to be tensioned. The aluminum cleat gives strength and wear resistant. The C827 Aero base is fitted with the C236 Mk1 Racing Junior with Roller Fairlead. The roller fairlead allows low friction tensioning of ropes that form a triangular rig. Ideal for sports netting, canvas structures, tie-downs radio masts and aerials. Easy to rig and adjust to give a 2:1 advantage. The position of the cleat on the rope can be adjusted by hand. No tools required.