Flush-joined casing has a heavier wall section and an integral pin and box threading . Jointed casing makes up flush on both the inside and outside diameters. The heavier wall section provides internal and external mating shoulders for the threaded portion to butt providing twice the contact area and helping to prevent the threads from climbing under heavy torque loads.

Standard casing drive shoes, tungsten carbride insert shoes,bits,casing plugs and casing clamps are generally available ex-stock.