Usage Tips:[Traction]: When the lawn is wet or the site has many slopes and inclines, the spikes give the robot mower better traction, no more digging in the lawn. With our robot spikes, you can prevent your lawn robot from digging and leaving it in the lawn. [High-quality materials]Our spikes are made of stainless steel. The advantage associated with the material is that the spikes are rust-proof and therefore . [Easy installation, beautiful and healthy lawn]: Simply place the spike in the center of the wheel and secure it with the included screws. High-quality spikes a beautiful lawn. No more holes in your lawn with your Landroid mower robot. [High Compatibility]: The wheel size is 205mm, and the spikes can be used for all S and M models of Landroid mower robots. S300 [WR130E]; M500 [WR141E]; M700 [WR142E]; M1000 [WR143E]; S450i [WR101SI]; S450i [WR102SI]; S500i [WR105SI]; [WR11MI]; M800i [WG757E]; M900 [WG758E]; M1000i [WG796E.1]; M1200i ID B [WR113MI]; M50000. 0 2.0. [WR165E]; M700 2.0 [WR167E] Colour:As Shown Material:Cold rolled steel Size: 205x205 MM Package Contents: 1 x Mower Accessories set Only the above package content, other products are not included. Note: Light reflection 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 +/- 1-3cm.