These cutters have blades hardened to a Rockwell C rating of 57, the result is the hardest, sharpest blade you can buy. The body retains the classic XIKAR shape and features a lightweight nylon fiberglass composite. Xi cutter blades are made of high quality 440 stainless steel with an HRC of 57. All Xi cutters are the same ring gauge: they will cut a 54 ring gauge cigar in half. Depending on how much cap you cut, they will cut up to a 58 ring gauge cigar.