Usage Tips:Traction: When the lawn is wet or the property falls over with many ups and downs, the spikes give the robot mower better traction, no more digging in the lawn. With our Bosch Indego XS 300 400 350 M700 2021 you prevent your robot from backing up and staying in the lawn.material: our spikes are made of stainless steel. A material advantage is that the tips are stainless and therefore durable. Dimensions: 171mm x 2mm. In addition, 12 stainless steel screws are included.Easy to install and beautiful and healthy lawn: simply center the spikes on the wheels and secure them with the screws provided. Premium spikes ensure a beautiful lawn. No more holes in the lawn while driving your Bosch Indego robot lawn mower.High compatibility: with 171 mm wheel size, compatible with Indego XS 300 400 350 M700 2021, made of 2.0 stainless steel mm, deburred, scope of delivery: 2 nails, 14 stainless steel flat head screws.