I recently purchased two units, one for a 6-inch jointer and the other for a 10 inch contractor's tablesaw whose factory-supplied mobile base didn't last. Both units assembled quickly and operate smoothly and silently. Package includes spare nuts & bolts in case a few get lost. These bases make a small shop workable, allowing effortless machine movement to accomodate material & workflow, facilitate clean-up, and change arrangement to accomodate new "toys." Caveat: Unless you have help to lift heavy machines into the assembled bases, it is necessary to assemble the bases around the machine; however, by tilting the machine up on a few 2 x 4 blocks, there is plenty of ground clearance to do that easily. A well-designed, simple, durable product that works as advertised.