High Quality Material: Our Robot Lawn Mower Wheel Size Tips Are Made From Stainless Steel And Polished In An Extra Production Step For A Perfect Look. All Edges Of The Traction Amplifier Are Deburred. Traction Enhancement For Robots: When The Lawn Is Wet Or The Terrain Is Sloping With Many Ups And Downs, The Spikes Give The Robotic Lawn Mower Better Traction, No More Digging In The Lawn. That Your Robot Mower Moves And Stays In The Lawn. Quality Screws: With 12 M4 stainless steel screws, they ensure easy installation of the robotic mower tips. Thanks to the countersunk screw holes, the screws fit perfectly into the spikes and ensure a perfect look for your robotic lawnmower. Easy assembly: Thanks to the intuitive attachment and the 6 screws supplied per wheel, the spikes can be mounted on the robotic mower in no time. Use A Cordless Screwdriver Or Screwdriver To Install It Centered On The Wheels. It was easy to screw on. Attention To The Centering! Wide Compatibility: 205mm wheel size, compatible with Worx Landroid S and M, for the following models: S300 [Wr130E]; M500 [Wr141E]; M700 [Wr142E]; M1000 [Wr143E]; S450i [Wr101Si]; S450i [Wr102Si]; S500i [Wr105Si]; S45Si]; 0i [Wr11 06Si]; S700i [Wr101Si]; M800i [Wr11Mi]; M800i [Wg757E]; M900 [Wg758E]; M1000i [Wg796E.1]; M1200i-Id B [Wr113Mi]; M50000. 0 2.0 [Wr165E]; M700 2.0 [Wr167E].