TrimmerPlus BC720 Brushcutter with J-Handle for Attachment Capable String Trimmers, Polesaws, and Powerheads, Fatigue STRAIGHT SHAFT DESIGN: pro-style design allows for easy trimming under shrubs and low branches. 4-TIP STEEL BLADE: reversible blade with cutoff guard gives it power to slice through heavy brush. INCLUDED J-BAR AND SHOULDER STRAP: added features for easier use and more control during your yard job. WARRANTY: 2-year limited. COMPATIBILITY: fits Attachment capable units from Troy-Bilt, Remington, Craftsman, yard machines, yard man, Snapper, Murray, Bolens, and most other major brands. Inner coupler tube diameter: 1.65-Inches. Drive Shaft connector: Square shape, 1/5, female.