Xi cutter blades are made of high quality 440 stainless steel with an HRC of 57. All Xi3 cutters features the same unique, ergonomic teardrop shape and double-guillotine action that gives the Xi and the Xi2 such powerful cutting ability in one simple squeezing motion. 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. Available in redwood, tech and titanium.”” – The Xikar Website”.