SNAPPY Centrotec to 1/4in Hex Quick-Change Adapter Unique sized drive shaft fits drills with Centrotec chucks Use common 1/4" hex shank power bits in drills with Centrotec chucks Quickly change from drilling to driving on bits with 1/4" hex power bit shank Simply pushing the bit in will lock it firmly into the drive channel Pulling back the knurled sleeve allows the tool to be quickly removed