Festool Centrotec Hook Driver/Adapter - Allows you to drive hooks with your cordless drill. The Centrotec shank can be used with all three-jaw chucks for no-slip performance or in conjunction with Festool's Centrotec chuck system. With the Centrotec design there is a better transfer of force with no chance for bit slippage or marring of the drill bit. Reduce the weight of the drill by nearly ½ pound and the length by nearly 1-1/2?ö with the Centrotec system. Additionally the Centrotec system offers a quicker way of changing bits than a keyless chuck with less run out.Drive hooks fast with your drill.Ease of use with large opening for quick alignment.Solid steel for an extended use life.Long precision milled hex shank for secure clamping and no wobble while in use.Fits either Festool Centrotec chuck or standard chuck.