Double Clamps are for applications requiring the highest strength. They provide the strongest grip and the greatest rigidity. The clamps can also be used to fill gaps in the rail, up to 5/8, by gripping the two rails and inserting a short rail piece in the middle. And they are great for removable track sections and bridges.
Clamps are built with Stainless Steel 6-32NC Socket Head Cap Screws (SHCS) requiring 7/64 tool.