This is a 9" Archer 36 tooth Tungsten Carbide tipped Brush Cutter Blade, the blade is precision made. Strong and durable tungsten carbide tips provide excellent cutting performance and will last 30 times longer (if not more) between sharpening then conventional blades. The blade has a 1" arbor but a 20mm adapter ring is included with the blade for installing on units with a 20mm arbor shaft such as Stihl. The Carbide tip is 1.8mm thick and the blade is 1.3mm.
Archer products are sold world wide and are known for their high quality!!