100% Traction: When the lawn is wet or the ground has many bumps and hollows, the spikes give the robotic lawnmower better traction, no more digging in the lawn. With our Husqvarna, you prevent your robotic lawnmower from accumulating and remaining in the lawn. Premium Material: Our nails are made of 100% stainless steel. An advantage of the material is that the studs are rust-proof and therefore durable. Dimensions: 255 x 2 mm. In addition, 21 stainless steel screws are included in the delivery. Easy installation and beautiful, healthy lawn: Simply center the spikes on the wheels and secure them with the screws provided. High-quality spikes ensure a beautiful lawn. No more holes in the lawn when driving your Husqvarna robotic mower. Wide Compatibility: With a wheel size of 255 mm, compatible with Husqvarna Automower 420 / 320 / 430X / 440, made of 2.5 mm stainless steel, deburred, the package includes: 2 x end caps, 21 x stainless steel flat head screws.