Makita is giving landscapers more options with both MM4® 4-Stroke Engine and 18V X2 LXT® (36V) cordless couple-shaft power heads (sold separately), and the String Trimmer Couple Shaft Attachment is the right accessory for use with this versatile system. It quickly attaches to the power head for easy operation. The M10 x 1.25 LH shaft arbor fits common sized trimmer heads for increased versatility, with bump and feed for increased efficiency. The steel drive shaft is engineered for lower vibration and longer service life. FEATURES M10 x 1.25 LH shaft arbor fits common sized trimmer heads Steel drive shaft for less vibration and longer equipment life 17" cutting swathe for efficient grass cutting Bump and feed trimmer head for quick and efficient line feed Quickly attaches to power head for easy operation Less weight for operator comfort For use with Makita Couple Shaft Power Heads