Review on 🅿️ Professional Grade Rubber Parking Guide Blocks - Heavy Duty Wheel Stops for Car Garage Parks with Reflective Stripes - Ideal for Trucks, RVs, and Trailers - 2 Pack - 21.25"(L)x5.7"(W)x3.54"(H) by Adrian Allen

Received these today. They are definitely heavy and made out of real rubber. The listing says they weigh 14 pounds each, but I weighed them at 13-13.5 pounds. I haven't had a chance to test them but they seem to be able to get the job done. I don't plan on drilling holes in my garage floor, but I think if the floor and studs are clean they should stay in place. I give them 4 stars now but after testing them I don't see why I wouldn't give them 5 stars in a later review. 02/20/19 follow-up after using these stops for several weeks. I will give them 5 stars. Good quality and heavy as advertised. They are not attached to my garage floor but come with brackets for drilling holes in concrete. I prefer not to use or use tape. As a result, they can move slightly when your wheel isn't in contact with or near the center of the stop, but this is my pick. Also, they don't weigh 14 pounds as advertised, but closer to 13 pounds - not a big deal, but the extra pound will help. They're expensive but for the price they should be £14. Overall they seem to be the best and I am satisfied.