CompatibilityDesigned for Yardforce robotic lawnmowers, including SA, SC, SE, R, MR, Classic, and NX series models Premium MaterialCrafted from durable SPCC, Cold platesurface electroplating for long-lasting performance and resistance to corrosion Enhanced TractionThese anti-slip spikes provide improved grip and stability for your robotic lawnmower on various terrains Easy InstallationComes with 14 torx head self-tapping screws for simple and secure attachment to your lawnmower Complete PackageIncludes 2 spikes, 14 screws, and an English instruction manual for hassle-free setup and use Specifications Material SPCC, Cold platesurface electroplating Product size 2112.5mm Compatible with Yardforce SA series robotic lawnmowers Yardforce SC series robotic lawnmowers Yardforce SE series robotic lawnmowers Yardforce R series robotic lawnmowers Yardforce MR series robotic lawnmowers Yardforce Classic series robotic lawnmowers Yardforce NX series robotic lawnmowers