The 10 in. x 10 in. Base Foot attaches to the bottom of the base mast section. The belted rubber backing is durable and provides protection and solid footing during the setup process. The large area lowers the ground pressure for earthen surfaces. Each foot has two holes for pinning to the ground or larger sill plate. Pinning to the ground surface may not be required if secured by alternate means. Refer to the user manual for specific setup requirements.