BSRTTOOl 2Pcs Core Drill Bit Arbor Adapter 3/8" Round Shank to 5/8"-11 Threaded for Backing Pad and Electric Drill, Core Drill Bit Adapter - - Amazon.com
Wera - Socket Adapter: Square-Drive to Hex Bit, 3/8 & 1/4" - 01135219 - MSC Industrial Supply
SZ-9 Apex 3/8'' Square Drive Socket Head (Hex-Allen) Bits With Drive Adapters, SAE
Wera - Hex Driver Bit Adapter: Quick Release - 02091940 - MSC Industrial Supply
8 Pcs Drill Bit Adapter Impact Grade Socket Adapter Set Hex Shank Drill Nut Driver Bit Set Sizes 1/4", 3/8", 1/2-Inch for Screwdriver, Cordless Drill, Power Drill - - Amazon.com
TOOLCRAFT 815287 Bit adapter 8 mm Downforce 3/8" (10 mm) 1 pc(s) | Conrad.com
Kobalt 3/8-in 3/8-in x 1/4-in Hex Bit Adapter in the Drive Tool & Socket Accessories department at Lowes.com
Amazon.com: Socket Bit Adapter, 3Pcs Socket Adapter 1/4” Hex Shank to 1/4" 3 /8" 1/2" Square Head Drill Bit Driver(Silver) : Industrial & Scientific
Wera Tools 344511 3/8" Square to 1/4" Hex Adaptor (Extra Strong)