5-Pack OX BLOX Heavy Duty Trailer Jack Block - Made in USA RV Leveling Blocks - Supports Up to 10,000 lbs - RV Jack Blocks for Any Tongue Jack, Post, Foot, or Stabilizer (Round or Square)

This product is heavy duty and performs as expected. Please note that the block features various color specs and is not entirely black. If you're looking for a solid black appearance, I recommend checking the specific product details or images before purchasing to ensure it meets your expectations.

I have a total of five of these. One for over a year and four I purchased in June 2024. I have an inclined driveway and I use two under each of the front stabilizers and one under the front trailer jack. They have held up well to heat, sun and cold. When stacked they have a nice secure interlock. They are a bit heavy, but are solid and well made. I would definitely purchase these again.

Looks to be durable, works well

Delivered within a day! Wow! Haven’t had a chance to use it but if it performs as well as it looks and feels, this is a winner all around.

We were looking for blocks to store our cab over camper on at home instead of cement pier block's. These fit the bill our truck needs tall blocks to drive out from underneath it to load and unload, we talked about figuring a place store wood blocks in the camper should we need to remove camper from truck. Now we have solved both problems. These blocks aren’t light either but less then it would be with heavy duty wood blocks and these are all weather and also has an area raised around the middle that cradle the legs of our landing pads. These will definitely outlast us buy it once and done. It would also work well for a trailer tongue block. Made in USA *****

I use this to get the nose of my boat a little higher while sitting on the RV pad. The solid construction handles the weight of the boat well. The boat trailer jack has a wheel on the bottom and the Jack Block has the perfect notch for a jack wheel. It's a simple device and one might argue pricey. A counter-argument would be that I built my own jack block of out wood previously (4x4 and 2x8s) and it broke from the weight of the boat after a couple years use. I think this jack block will hold up better and is worth the money.

I really like this block. Its light compared to my wood blocks. I thought this was like a heavy rubber but its a hard plastic. It does the job and I like the corners that keep my jack from sliding which has happened before on a really unlevel site. My only gripe is that its pricey for what it is. Thisbis more like a 30 dollar item def not 50. If I knew it was hard plastic I wouldnt have been a buyer at 50 bucks. All in all its a good product. Update..this began ruining my driveway. All the weight is around the edge so now my driveway has square divits in it. Its great for campground but not your drivway

Before getting we were carrying multiple pieces of wood. Those are not necessary now. It sturdy and strong.