Flexible jaw inserts are non-marring and are easily removed. They"re made of high impact ABS plastic for long life and heavy use. The dual pivot feature allows the Merle to clamp virtually any size or shape securely! Perfect for circles and ovals, plus triangles, hexagons, octagons, and more. 23" STEEL banding included. The Merle clamp has almost no capacity limitation! Clamps as small as 2-5/8" x 2-5/8" to 69" x 69", or 23" around, but can be extended to any length by using standard 3/8" steel banding or strapping. The Merle clamp will hold any type of frame for easy gluing, nailing or screwing. Even jointing force at all corners. It"s excellent for wide cabinet type frames (use in the center or edges), and also for narrow picture frames. The adjustable Merle clamp allows you to use as much or as little clamping pressure as needed. Cast aluminum and steel construction makes the Merle clamp a tough tool that will work hard and long for you. Quick Release Corner Clips pull off with finger pressure. Just clip on more corners and get to work!