This product is made of high quality with excellent rust resistance and long durability, which is designed to provide stronger traction for the robot mower on wet or sloping lawns, avoiding slipping and affecting the operation results. It is easy to install and not only improves the mowing efficiency after use, but also protects the lawn from damage and keeps it beautiful and tidy. This material is known for its excellent resistance, can be in long-term with moisture, soil and other environments to maintain a clean as new, Its excellent tensile strength and hardness also ensures that the anti-slip nails are not easily deformed and worn out when subjected to repeated pressure and friction, thus prolonging the overall service life, reducing the frequency of replacement, and saving you maintenance costs. Tand have been carefully calculated and tested to that they provide effective traction without causing excessive damage to the lawn. for Landroid Robotic lawn mower series S450i WR101 SI: M800i WR111MI: S300 WR130E: S415i WR102SI: M800iWG757E: M500 WR141E: M500 2.0 WR165E: S450i WR106SI: M900 WG758E: M700 WR142E: M700 2.0WR167E: S700iWR101 SI M1000IWG796E.1: M1000 WR143E Colour:black Material:plastic Note: Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. Due to different batches, there may be differences in product appearance and printed text, which not affect use Package Contents: 1 set * Lawn Mower Spikes 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.