Ryobi Expand-It 8 in. Brush Cutter Trimmer Attachment (Certified Refurbished) Universal Brand Fit/Straight shaft provides extended reach Brush Cutter designed to cut thicker weeds and pulpy stalks Tri-Arc blade has 8" diameter and is made from heavy grade steel Heavy duty gear box provides extended life Expand-it tools fit many attachment capable trimmer brands including Toro, Weed Eater, Troy Bilt and many others