The Black & Decker 13" Automatic String Trimmer features an automatic Feed Spool - No bumping required. Centrifugal force feeds line as needed. Groom N' Edge head rotates 180 degrees for edging. Edge guide assists with maintenance edging. Adjustable secondary handle for maximum comfort and control. Cord retention system prevents accidental cord disconnection. SPECIFICATIONS: 4.2 motor, 10,000 RPM, 0.65" line, and replacement spool AF-100. 13" cutting swath. 4.6 lbs.