PETZL - MINDER, High Strength, Very High Efficiency Prusik Pulley INTENDED USE: Special side plates designed for use with a Prusik friction hitch in progress capture systems. EFFICIENT: Large diameter sheave mounted on sealed ball bearings for excellent efficiency. SUITS YOU: Accepts up to three carabiners to facilitate use. WEIGHT: MINDER weighs 295 grams. STRENGTH: Has the maximum working load of 8 kN.