Dangerous at best
I just received this ramp and it is going right back for a refund. There is no safe way to attach this ramp to the doorway. They forgot to add a lip area to rest against the opening so the ramps easily slip away from the door frame when pulling up a wheelchair onto the ramp. The underneath also has an area with poorly cut metal with sharp edges. I have no idea who designed this ramp but it is clearly defective and unusable for the stated purpose.