Detailed features: Steel hook. Steel ring. Mounting hardware included for concrete ceiling. Precision ball-bearing swivel. Snap hook included. Supports up to 90 kg. Material: high-quality steel. Color: black/silver. Features: ball-bearing swivel, metal ring. Product dimensions: 19.5 x 20 x 4 cm (L x W x H). Hole diameter: approx. 11 mm. Distance (center to center) of the two inner holes: approx. 9.5 cm. Distance (center to center) of the two outer holes: approx. 16.5 cm. Ceiling hook for punching bag This EXCALIBUR hook is suitable for hanging punching bags weighing up to 90 kg. It features a ball-bearing swivel and a solid steel ring. The four-point mounting ensures secure suspension and even load distribution. The carabiner included with this hook allows you to quickly hook and unhook the punching bag as required.