BLADE MOWER 18 58 Replacement XHT Lawnmower blade. XHT(Xtreme Hardness & Toughness) blades are 25-40% harder than standard lawnmower blades. Benefits of the HXT blade are sharper and longer lasting cutting edges. More resistance to bending. Tighter tolerances in the aftermarket vs. OEM. XHT blades also offer greater impact toughness. (3) blades for 52\” cut. Fits new iCD decks. Center Hole: 5/8\” Length: 18\” Thickness: .250 Width: 2-1/2\” Sections and Models: Sunbelt – Blades > Blades Ferris (Undefined): SEVERAL (52\”) Snapper (Undefined): SEVERAL (52\”) mega-cross: Crossed From:: 5101756 : FERRIS 5101756 : SNAPPER