PoolSupplyTown 8" 80T Carbide Tip Brush Cutter, Trimmer, Weed Eater Blades Carbide tipped blade is estimated to last about 10 times longer than plain steel More teeth creates more aggregate cutting surfaces for longer lasting durability Carbide Tipped Trimmer Brushcutter Blades 8&amp;quot; diameter - 80 Teeth brazed-welded Made by CE certified Manufacturer. Package included: 1 (one) pcs 8" 80T Carbide Tip blades w/ washer UNIVERSAL FIT. It fit either 1&quot; (25.4 mm) or 20 mm arbor