5x Heavy Duty Drill Keyless Chuck 2-13mm 1/2 SDS Plus Adapter W/ Hex Shank Set | eBay
MAKITA, SDS-Plus For Chuck, 1/2 in Keyless Converts to Chuck, Chuck Adapter - 61HJ31|199139-5 - Grainger
Hymnorq 1/2-20UNF Keyless 1.5-13mm 3-Jaw Drill Chuck with SDS Plus Shank Adaptor, Full Metal Body, Fit Rotary Hammer and Hammer Drill, to Hold Bits from 1/16 Inch to 1/2 Inch - - Amazon.com