The Tandem Speed by Petzl is a practical multi-use rope pulley with a dual axle, which can be used on fabric or steel ropes. The pulleys, lined up behind each other, are made out of rustproof steel and run on ball bearings. So the rope pulley is approved for speeds up to 20 m/s and runs nice and smoothly. It can be used either for gear transport or for rope bridges. There is space for up to three carabiners in the opening. The service load is not allowed to exceed 10 kN; the breaking load is 24 kN.