Festool 492648 Centrotec Quick Release Bit Holder BHS 65mm Adapts all standard bits to the quick change capability of the Centrotec System Magnetic insert holds your bits securely in place to prevent loss Quick release spring tensioned system secures bits during use Long, precision milled hex shank eliminates wobble, or run out during use Fits Festool Centrotec Chuck as well as standard and keyless chucks