"When loading up equipment or vehicles, the last thing you want is to hear or feel the tires spinning. Load up securely in any weather condition with HD Ramps 39.75"" x 12"" Trailer Traction Treads. This aluminum tread features aggressive oval punch plate traction to grip tires and keep them moving. With six pre-punched holes, this HD Ramps Trailer Traction Tread is designed to be installed any surface where extra traction is required, such as enclosed trailers with fold-down ramp doors, open trailers, or wooden shed ramps. It installs with your choice of hardware (not included), and will make it a lot easier to load up in muddy, icy or wet conditions."