Blade-Mower, Xht, 16-1/4", 2-1/2" XHT (Xtreme Hardness & Toughness) blades feature a unique steel that incorporates boron, carbon, manganese, and other materials that ensure its strength. The blades are heat treated with the patented and independently tested Marbain heat-treating process. This process makes the blades 25% - 40% harder than standard lawnmower blades, making them the longest-lasting, safest, and most impact resistant lawnmower blades on the market.    Center Hole: 15/16"    Length: 16-1/4"    Replaces: Exmark: 103-6381    Thickness: .197"    Width: 2-1/2" Exmark Walk-Behind Mower METRO HP TURF TRACER HP LAZER Z LAZER Z ADVANTAGE X LAZER Z AS LAZER Z CT LAZER Z HP QUEST
