THIS KIT INCLUDES THREE BLADES AND THREE SPINDLES. THE SPINDLES REPLACE PART NUMBERS 174356, 532174356 532-174356, 82-015, 285-108 AND 11014. SPINDLE HEIGHT: 6". THE MULCHING BLADES REPLACE 173921, 532173921, 532 17 39-21, 340-091, B1EP1040 AND 10377. THE BLADES ARE 16-5/8" X 2-1/2", 5 PT. STAR. FITS CRAFTSMAN 48" MOWERS.Warning:Lead-Nickel-Cancer and Reproductive Harm