General Description Improve the traction of your Worx robotic lawnmower with our high-quality stainless steel spikes. They prevent holes in the lawn, make it easier to climb steep terrain, and reduce slipping on wet surfaces. Technical Specifications Diameter: 205 mm Thickness: 2 mm Material: 304 Stainless Steel Screws: Stainless Steel, dimensions 4 x 20 mm Compatibility and Accessories Compatible with the following S and M models (not compatible with 2021 models): S300 [WR130E] M500 [WR141E] M700 [WR142E] M1000 [WR143E] S450i [WR101 SI] S450i [WR102SI] S450i [WR106SI] S700i [WR101 SI] M800i [WR111MI] M800i [WG757E] M900 [WG758E] M1000i [WG796E.1] M500 2.0 [WR165E] M700 2.0 [WR167E] Installation Installation instructions: Mount on the outside of the tire Tools required: Phillips drill and 1.5 mm drill (optional) Usage To install, place the robotic lawnmower vertically and then center the spikes on the wheels. Pre-drill holes if necessary and use the included screws to attach the spikes. Other information We offer 100% aftermarket service to ensure your satisfaction with our robotic lawnmower spikes.