The Avenger C345BK Barrel Clamp with T-Knob in Black has several uses. It has a removable baby (5/8") spigot and a junior (1 1/8") receptor. It has a T-Knob locking mechanism and a safety cable. This clamp is extremely strong. It has a load capacity of 600kg, due mainly to gravity casting which eliminates any kind of air bubbles from forming inside the casting material. It will mount to any pipe between 42 - 52mm in diameter.