These saw horses are made out of one sheet particle board. The legs are double thickness laminated together to give stability with a hole cut in the center to reduce the weight and allow you to easily carry them. Both the legs and the stretchers have notches that slide into one another and the notches are angled so that the legs can splay outward for even more stability. On the top side of the stretchers I glued a 2×3 with a dado down the center to accept the particle board. Notice the notches on the sides of the legs. You can flip the legs over to lower or raise the height to suit your needs. I currently have sacrificial 2×4’s on top to rip down sheet goods. I have attached cleats to the 2×4’s that hug the stretchers so they are less likely to move around on me. Another cool use is to create plywood bases with cleats for you small power tools, like a miter saw or a grinder or a scroll saw or whatever. Lets say your miter saw is attached to a plywood base and the base has cleats that hug the stretchers so you miter saw will be very stable in use on these saw horses and you can quickly switch to another tool when done. I am sure there are several more uses for these that you can come up with.