High quality,made of heavy-duty steel, sturdy and durable for long life. High concentricity and 1/2 inch shank diameter,don't worry about wobble and bent. Overall length of the router collet extension is 3-1/4 Inch. Greater for that router table that doesn't quite extent to where you want it to. International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions., Weight: 0.2866009406 Pounds, Manufacturer: Wolfride