So these lab jack stands from SHEUTSAN are seriously handy for any laboratory or workshop setting! You get two of them in this set, each measuring 6x6 inches (15x15cm) with a maximum height of 9.8 inches and a minimum lowered height of 3 inches - that gives you plenty of adjustment range. They're made from heavy-duty stainless steel with galvanized scissor brackets in the middle, which makes them really strong and durable without being prone to bending or breaking. Using them is super simple - just place the lifting platform steadily on your work surface and turn the black knob to rotate the shaft, which adjusts the upper panel to whatever height you need. The smooth surface makes cleaning really easy too, so you can keep using them for years. These are essential tools for any lab - they work great as support apparatus for lifting objects or holding instruments during experiments. They're widely used in schools, research laboratories, or even for home projects where you need precise height adjustment. The construction is professional and stable, so you don't have to worry about your equipment wobbling around. SHEUTSAN is actually a professional manufacturer with proper equipment and craftsmanship, so you're getting a quality product. They stand behind their products too - if you have any issues, they promise to provide satisfactory service within 24 hours. For the price, getting two of these is actually a really good deal compared to what some other brands charge for similar quality lab jacks.