1. Durable and PracticalThis lawn trimmer cutting head, made from quality material, is designed for longterm practical use. It withstands frequent and rigorous trimming tasks without losing performance. 2. Easy InstallationWith its solid and reliable construction, this bump head is easy to install on your ST155, ST165, ST175, ST285, and ST275 trimmers. You can quickly and effortlessly your old or damaged cutting head with this one, ensuring a smooth and hassle installation. 3. CompatibilityFits with STseries trimmers, including ST155, ST165, ST175, ST275, ST285, Z830SB, D630CD, D725CDE, D825SD, D825SB, D825CA, and D630CD D725CDE models. It also serves as a replacement for 000998265 DA0459, DA04591A, and DA04591 trimmer heads. 4. Wide CompatibilityThis bump head not only works with trimmers but is also compatible with 55053, C1200, and WE225 B1WE225 models. Whether you own one of these or other brands, this cutting head can conveniently fit and enhance your trimming experience.