XL model makes setting even extra large rivet nuts like 1/2″ and M12 a breeze; Six interchangeable mandrel/nosepiece sets in Metric and SAE sizes: M8, M10, M12, 5/16″, 3/8″, and 1/2″; Tool-Less Quick-Change Head design allows for easy changing of mandrels and nose pieces by hand; Disassembly of tool never required, unique spring loaded inner hex sleeve automatically locks the rotation of hand installed mandrels; Includes 10pc rivet nuts of each included size; XL handles and hinge system multiply input force more than any other model