Premium Material: Made of high quality material, durable and convenient to use (Please receive promo code on the product page upon purchase for a cheaper price.) Wide Usage: Suitable for automotive manufacturing, mold making, machine making, etc. More Safety: Eliminate the dangerous temptation to remove the shank from the collet, lengthen the bit to get the full depth of cut. Safety Notice: The extension rod should be tight, but the clamp nut should only be tightened with the same pressure as any router clamp. Please note that the extension rod should be well cooled, but the clamp nut 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 an elevator, they still make bit changes easier as you won't have to remove the insert ring. They are also great for custom routing tables with extra thick tops, as they provide the extra depth of cut needed for many routing tasks. Features: High precision, stable performance. High resistance and hardness. Durable in use. Make you more efficient in processing products. Suitable for automotive manufacturing, mold making, machine making, etc. Warning: Make sure the router clamp extension is properly assembled. Please note that the extension rod should be tight, but the clamp nut should only be tightened with the same pressure as any router pliers. Specifications: Material: Hard Alloy Color: Black Shank diameter: 8mm Keep the diameter: 8mm Total length: 86mm Content: 8mm Router Collet ExtensionProducts from NIUNIU's store