Makita B-60109 Commercial Grade Automatic Feed String Trimmer Head Universal LH arbor can be adapted for use with 8 mm and 10 mm arbor string trimmers Accepts up to 17 of .080", 12' of .095", 10' of .105" and 9' of .110" trimmer line Trimmer head comes equipped with .095" standard round trimmer line Trimmer head feeds line automatically and can be simultaneously bumped to quickly extend line Dual track spool