These Hold-Down Clamps slide into the T-slots in the table of your Axiom CNC router to secure a wide variety of objects. Just position the clamps over the edge of your workpiece and tighten down the large, knurled knobs for a secure hold. The clamps open to accommodate material up to 3'' thick. They are made from sturdy aluminum, which is anodized to avoid marking light colored materials. Sold in pairs.