1. Adopt internal fixed plate structure to ensure consistency and safety. 2. More sharp and efficient than other types. 3. It can work normally when hitting the stone and hard block. The service life will be 10 times longer than other trimmer heads. 4. Suitable for most models of mowers. 5. Suitable for straight shaft garden pole tool products. Features: No rust, , long service life. It consists of an internal fixed plate. Size: 15 cm Material: stainless steel Color: silver Package Contents: 1 x Steel Cutter Head Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.