SPECTRUM Hinged type pin drive Master Bushing for 37½” - 49½” Rotary Table is conforming to API-7K specification for drilling operations. With the help of Insert Bowls, it is capable to handle Drill Collar, Tubing and Casing ranging from 2-3/8” to 13-3/8” . It can be removed from the rotary table to pass large diameter bit and pipe connections directly through the Rotary table and it has all the performance features of a solid master bushing. It is used with optional insert bowl no. 1,2 or 3 to handle different sizes of tubular. The Master Bushing suitable for EMSCO rotary table . Master Bushing is also equipped with retainer pins to prevent them from falling out when the hinges are opened.