The HIT Fitness spotter arms are compatible with HIT Fitness Power Racks* and they are sold in pairs. Spotter arms are used for catching the bar if the lifter fails to lift a certain weight whilst performing a resistance training exercise. They are suitable for both home and commercial gym use and they are ideal for people who prefer to train alone. *Not compatible with Commercial Racks. Benefits: Adjustable Safety Spotter Arms Heavy-duty construction Extremely durable Easy set-up and quick to adjust in between exercises Provides protection and safety to both the lifter and lifting equipment Suitable for all height requirements Suitable attachment for Hit Fitness Power Racks Specifications: HIT Fitness Spotter Arms Colour: Black Product Weight: 17kg Product Dimensions: 7.5Wx38Hx73L (cm) Maximum Weight Capacity: 250 (kg) The diameter of hole insertions: φ21 (mm) Sold in pairs Compatible with HIT Fitness Power Racks Fitness Tip: HIT Fitness Spotter Arms are perfect for protecting athletes whilst they are performing movements such as squats, bench press, overhead press, and lunges.