✔The heavy-duty curb ramp is made of high-quality rubber and plastic and can withstand heavy loads up to 3T/6600 lbs ✔The car ramp has a 17° slope and is designed to provide a smooth transition for cars wheelchairs and stairs up and down ✔The threshold ramp surface is designed with a non-slip texture to provide maximum traction and safety for users ✔Portable driveway ramp easy to carry. The grooves on both sides prevent water accumulation. The bottom groove design is reasonable in structure resistant to pressure and wear ✔The step ramp comes with 2 pre-installed mounting holes with expansion screws for permanent installation