Hinged Non welded positive Centralizers are uniquely designed with flat bottom U profile of different Base. The Centralizers significantly reduce frictional drag while being using it in deviated holes. These Centralizers provides almost 100% Stand-Off when run inside a cased hole. They are made up of 1/4" or 6 mm less than the inside diameter of the hole size in which the Centralizer is to be worked. This design reduces weak (brittle) spots passage. End Collars are designed with self-locking action, which is easy to assemble, saves time, and has a strong grip.