Premium Material: Made of high quality material, durable and easy to use (please receive promo code on product page to get cheaper price when buying.) Versatile: Suitable for car manufacturing, mold making, machinery manufacturing, etc. . Safer: Eliminate the dangerous temptation to remove the shank from the collet, lengthen the drill for full depth of cutSafety Note: The extension rod should be tightened, but the clamp nut should only be tightened with the same pressure as any router clamp. Please note that the extension rods should cool sufficiently, but the clamp nuts should only be tightened with the same pressure as any router clamp. This clamp extender allows you to change router bits above the table even without a lift. Even if you have a lift, they still make it easier for you Make some changes' without having to remove the insert ring.They are also ideal for custom routing sheets with extra thick tops as they provide the extra depth of cut required for many routing tasks. Features: high precision and stable performance. High resistance and hardness. Built to last. Makes you more efficient when processing products. Suitable for automobile manufacturing, mold manufacturing, machinery manufacturing, etc. WARNING: Make sure the router clamp extension is assembled correctly. Note that the extension rod should be tightened, but the clamp nut should only be tightened with the same pressure as any router pliers. Specifications: Material: Carbide Color: Black Shank Diameter: 8mm