Typically used to renew when original clamp has lost strength, worn internally, or seeking an uplift from the earlier double version for less backlash (wobble) where stem has worn.
63mm at bead, 50PSI, suits 6" rims of NAMI Klima and Teverun Fighter Mini (stock tyre), 6" rim models of Dragon Predator & Cyclone and front of Dragon GTR (inc V2).