Assertion: wheel chock | /r/HasProperty | necessity
Facets:
Source sentences:
text: If you work on your car and use a jack, wheel chocks are a necessity.
text: A: Wheel chocks are needed especially when parking on a road with an incline.
text: Q: When are wheel chocks required?
text: Wheel chocks are necessary for your RV or travel trailer to keep them from rolling away.
text: It should further be kept in mind that even if the vehicle is parked on level ground, wheel chocks are still a necessity, as there is still a danger that the vehicle might roll forward.