MARATHON Swing Hanger for CONCRETE installation - Heavy duty hanger with Ball Bearing Technology up to 60 min continuous moving Including anchor screws for concrete installation, allowed for Commercial Use (because of ETA Option 1) Can be combined with all MARATHON components 1 piece, take 2 for swinging in one direction Meets ASTM Safety Standards, EN 71 for Residential Use, EN 1176 Commercial Use absolute silent, smooth and free of maintenance, Supports for- & backward movements /lateral movement are filtered / Weight Limit: 275 lbs / 125 kg (2200lbs shock proofed)