6400X8 Router Bit Shank Adapter – 8mm to 1/2"The Whiteside Router Bit Shank Adapter expands your routers capability by enabling a 1 2" collet to hold 8 mm shank bits. Made from industrial grade steel, this router bit shank adapter delivers exceptional clamping force, reducing slippage and vibration for cleaner cuts and safer routing. Features: Made from industrial grade steel for strength and long term durability Fits inside a 1 2" router collet to adapt it for 8 mm shank router bits Securely