From the brand Product description 🌼【Stainless Steel Lawn Mower Spikes for Bosch Indego Traction】: When the lawn is wet or the terrain is sloping with many heights and depths, the spikes give the robot mower better traction, no more digging into the lawn. 🌼【Stainless Steel Lawn Spikes for Robot Traction Aid for Bosch Indego 【Mowing】: With our For Bosch Indego XS 300, M700, S 500, M+700, S+500, you prevent your robotic lawnmower from moving around and getting stuck in the lawn. 🌼【100% Stainless Steel Premium Material】: Our studs are made of 100% stainless steel. One of the advantages of the material is that the studs do not rust and therefore have a long service life. The dimensions are 170 mm x 2.5 mm. In addition, 12 stainless steel screws are included in the delivery. 🌼【Easy to Install】: Simply center the studs on the wheels and secure them with the screws provided. The high-quality studs ensure a beautiful lawn. No more holes in the lawn while driving your Bosch Indego robot