The Musclechuck Router Collet Reduction Sleeve is a universal split-type steel bushing that allows you to use 6mm shank router bits in 1/2" collets.

Disclaimer: Power tools and their accessories, such as the “Musclechuck™” assembly, should only be used for their intended purpose by users experienced in their operation. Careless handling or misuse may result in serious injury or death.  The user must always make sure that the cutter is secure in the chuck, especially when a reduction collet is being used BEFORE turning on the router.