Designed to lift up to 1200 feet of rope so you don't have to. A fully functional pulley you can drive with a drill. Integrated swivel and locking sideplate make it easy to load your rope and manage twists. When driven by a drill the H1 can retract ropes weighing up to 30 kg (66 lbs). It can be incorporated into a mechanical advantage system for more lifting power. Ribs on the sheave grab the rope without damaging it. We recommend the Milwaukee M18 Drill The H1 is designed to pull rope, not heavy loads or people. There is no progress capture, whatever tool you insert into the hex socket is the only thing holding the load. The rope is not captured by the sheave and can slip. DO NOT USE TO LIFT PEOPLE OR OVERHEAD LOADS. The ribbed wheel relies on resistance behind the pulley to engage with the rope, this can be applied by hand if the rope weight isn't enough. Rope retracting with a drill works best with 9-11mm rope. Working Load: 2.5 kN per side, 5 kN total. Pulley strength, not rope retracting strength Minimum breaking strength: 25 kN