【Cold Rolled Sheets】 - Our worx landroid S/M robotic lawn mower spikes are made of cold rolled sheets and the surface is polished to ensure that there are no burrs during loading and unloading. 【High Compatibility】 -Compatible with Worx Landroid S/M Robot Lawn Mower S300 [WR130E], S450i [WR101 SI / WR102SI / WR106SI], S500i [WR105SI], S700i [WR101 SI], M500 [WR141E / WR165E], M700 [WR142E], M800i [WR111MI / WG757E, M900 [WG758E], M1000 [WR143E], M1000i [WG796E.1], M500 2.0 [WR165E], M700 2.0 [WR167E]. ].