FeaturesHigh Quality Materials- Our robotic lawn mower spikes are made of stainless steel and polished in an additional manufacturing step for a premium appearance. All traction wheel upgrade edges are deburred. High-quality stainless steel screws with Torx heads (4x20) ensure easy installation of the robotic lawn mower spikes. Thanks to the countersunk screw holes, the screws fit the nails perfectly, giving the lawn mower a perfect appearance. Beautiful and healthy lawn: high-quality spikes ensure a beautiful lawn. With a robot lawn mower, there are no more holes in your lawn. Compatible with all L models. High quality- Our company has been passionate about gardening and DIY for decades. We are increasingly aware of the importance of a good tool. Our premium nails are manufactured to the highest quality standards. We use the right tools so that you can fully focus on your dream garden Specification Size: 225*225MM/205*205MM Material: stainless steel Package includes 2*traction wheel, 12*nails, 1*instruction