I sometimes have to park my car (4-speed) on a very steep driveway. I always put the parking brake on all the way and keep it in gear when parked.

But, I still worry it will slide as the car is heavy and the driveway is steep.

I have seen some heavy duty wheel chocks at repair shops, but I'm not sure where the average person can get those, or whether they work well on steep slopes?

What do you guys recommend for this type of parking? Any wheel chocks made specifically for cars parked on steep driveways?

Thanks much for any thoughts!