These Bessey double screw edge clamps are suitable for conventional screw clamps with a max rail thickness of 1/2" (13 mm). Comes with two plastic pressure caps to protect the work surface. ,Since 1889, Bessey has been setting standards in hand clamping & cutting technology. Our core competencies of research & development allow us to continuously create innovative new products &, to improve upon our current products. Bessey's tools are produced from the top quality materials, using state of-the-art techniques. This allows the highest degree of comfort, safety & user-friendliness so that you can also benefit from our unique innovation advantage &, in accordance with our company motto: “Bessey. Simply better.“,For California Residents:,   WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov,WARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. For more information go to www.P65Warnings.ca.gov/wood Bessey Double-Screw Edge Clamp - KT5-2