OB Carbon Fiber Shafts with Seamless Construction and Radial Symmetry. The multi-process capability is unique and diverse from other manufacturers. You get radial symmetry which is improved by a secondary operation which also benefits “Surface Condition”. Surface Condition is when shafts are prepped and finished based on the exclusive surface finish technique called “silky smooth”. Available in 2 joint diameters .840in fits most standard 3/8 x 10 Thread cues - .850in fits most standard Mcdermott cue joint diameters