Trimmer must run Counter-Clockwise for Tri-Clone™ Trimmer Head to work.

Straight-Shaft Gas Trimmers: Craftsman Cub Cadet, Echo*, Honda, Hitachi, Homelite, Husqvarna, John Deere, Jonsered, Makita, Maruyama MTD, Redmax, Shindaiwa*, Stihl, TMC, Troy-Bilt

*requires a steel plate adapter (Echo part# C535000100).

Straight-Shaft Lithium Battery Powered Trimmers: DeWalt DCST990M1 40V String Trimmer, ECHO V58, Milwaukee M18 Fuel String Trimmer, Husqvarna 536 LiLX, Ryobi 40V X Lithium-Ion String Trimmer, Stihl FSA 130 R

See more information on FAQ section.