Home C.K Tools Products C.K Tools Power Tool Accessories Screwdriver Bit Holders Keyless Chuck Adaptor Keyless Chuck Adaptor Keyless chuck - 1/4 hex drive 1/4" hexagon to 3 jaw chuck converter.E6.3 drive.Keyless chuck.Fits up to 6mm drill bits. Item No.Title T2463 C.K 1/4in Keyless Hexagonal Chuck Adaptor 6mm 6