The Kupo Steel Baby Boom is a sturdy chrome-plated support that will handle up to up to 11 lb of gear at its maximum extension of 7.8?. It has a 5/8? end stud and will mount to any grip head via its built-in ear. The tail-end hook is handy for sandbags and counter-weights.The Kupo Steel Baby Boom will support up to 11 lbs (5 Kg), extend to 7.8? (2.4m) and mount in any grip head with its built-in ear. Equipped with a tale-end hook for adding sandbags as counter-weights. Chrome-plated steel finish. 1 Riser, 2 Sections. Mount Type: 5/8 (16mm) Stud.