Compatible Replacement Adapters - Adapts from Ridgid to General and General To Ridgid Drain Cleaners (Ridgid 5/8" Cable End Only) (Not Cable Size) Usual cable sizes are 3/8" and 1/2" - Amazon.com
Jacobs 3653 K3C Thumb Handle Chuck Key with 5/16-Inch Pilot-Size for Jacobs Series 34-33C ,633C Keyed Chucks - Power Drill Accessories - Amazon.com