Usage Tips:Provides Traction When the lawn is wet or the ground has many inclines and slopes, the nails give the robotic lawnmower better traction, eliminating the need to dig in the lawnOur lawn mower robot cleats are made ofmaterial, wear-resistant and durable, and the right size to provide you with long-term service Easy To Install Just center the spike on the wheel and secure it with the included screws Beautiful Lawn spikes ensure a beautiful lawn. No more holes in your lawn with your lawn mower robot Specifications Product size 2052.5mm Material Plastic Metal Applicable to all WORX LANDROID lawn mower robot S and M models S300 WR130E, M500 WR141E, M700 WR142E, M1000 WR143E, S450i WR101 SI, S450i WR102SI, 500i WR105SI, S450i WR106SI, S700i WR101 SI, M800i WR111MI, M800i WG757E, M900 WG758E, M1000i WG796E.1, M1, 00i ID B. WR113MI, M500 2.0 WR165E, M700 2.0 WR167E Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store