LMT Belin - 13120 12mm Cut Diameter Upcut Router BitBelin Upcut Router Bits are designed to deliver an excellent cut finish to most types of rigid plastic materials such as acrylic, polycarbonate, PVC, nylon, etc. They are also very effective for use on woods and foams. Cut Diameter: 12mm Shank: 12mm Cut Length: 30mm Overall Length: 75mm Flute Type: Upcut The upward spiral geometry ejects swarf and dust toward the top of the cutter, making waste material removal easy with a quality extraction system.