A great wheel chock at a great price. (They were on sale less than $3 each) Sturdy, strong, they have a hole through the base you can string a piece of rope through so one of the other doesn't walk off and they're construction yellow so they don't get lost after you get through working with them. Used them to keep a trailer in place as I worked on it, while changing oil and to keep the wheeler from backing out of the trailer to go for a ride on it's own. Yeah it was strapped down, just a little insurance.