Description Update your barbell catchers with this pair of rubber J-hooks Slated. Compatible with any rack or cage system with 50mm X 50mm holes, these spotters can hold up to 200kg, suitable for beginner lifters to advanced squatters. These Slated J-Hooks are compatible with the following WFA Racks: BodyIron Squat Stand Reinforced E2 BodyIron Reinforced Squat Rack SS2 BodyIron Garage Rig ES2 Cage V2 BodyIron BL100 Home Power Rack BodyIron S1 Half Rack We will not accept any returns due to compatibility issues of attachments not fitting onto a rack that is not the BodyIron rack stated. These Slated J-hooks are an optional attachment for any squat rack or power cage with 50mm X 50mm tube size and (1 inch hole). Specifications Rated Capacity: 200kg. Tube Size: 50mm X 50mm. Pin Diameter: (1 inch hole).