Milwaukee 3/8 in. Square x 1/4 in. Hex Shockwave Impact Adapter 48-03-4405 - The Home Depot
3/8" Drive Male x 1/4" Hex Male Socket Adapter - 2" - IWAF26238B10 | Mac Tools
42024 - 3/8" Drill Bit Adapter - Make it Snappy Tools
Milwaukee SHOCKWAVE Impact Duty 1/4 in. x 3/8 in. Alloy Steel Square Socket Adapter 48-32-5031 - The Home Depot
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
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: Impact Adapter Square Socket Bit Adapter Hex Impact Socket for Drills, Extension Socket Driver Bits Impact Socket Adapter for Automotive DIY (3/8 Inch Square Tip, Silver) : Tools & Home Improvement
Hazet 2250-3 Adapter 3/8" square female to 5/16" hex female Bit Adapter