Stens 3 Spindles & 3 Blades Mulching Kit for MTD, Toro, Cub Cadet 54" Deck Lawn Mowers 918-0671B, 942-0677B Blade Specs: Center Hole: 6 pt. star - Outer Hole: 5/16 " Length: 18 1/2 - Width: 3 " Center To Center: 2 1/2 " Thickness: .160 "