Double-Alpha has upgraded the PDR-PRO-II to now include an aluminum rail instead of a plastic rail, and redesigned the manner in which the height adjustment and vertical lock-up is achieved. The PDR PRO-II now has a set screw in the ball itself, which can be accessed from its inner side, allowing you to adjust height to any position, not just in the predetermined 10mm steps as before. Also this height adjustment can now be achieved without dismantling the holster and without losing any of the other settings. The new rail attaches to the holster body more parallel to the gun's slide, which increases the usable range of adjustment in the ball joint, allowing you to bring the gun much closer to the body than with the previous rail design. The holster body itself has undergone several improvements as well. The high inner flap which previously covered most guns' safeties has been lowered, allowing you to obtain a more complete in-the-holster shooting-grip. The material has be...