Amazon.com: Quickun Brass Hose Barb Reducer 1/2" to 1/4" Barbed Reducer Fitting Reducing Splicer Mender Union Adapter for Air Water Fuel : Industrial & Scientific
SharkBite 1/4-in (3/8-in OD) Push-to-Connect x 1/2-in FNPT Female Adapter in the Push to Connect Fittings department at Lowes.com
Yakamoz Quick Release 1/2-Inch Square Drive to 1/4-Inch Hex Female Socket Adapter Converter Chuck Adaptor for Impact and Ratchet Wrenches - Amazon.com
3/8" to 1/4" 1/2 inch Drive Ratchet Converter Socket Adapter Reducer Air Imp GA | eBay
Orbit 1/2 in. x 3/4 in. MNPT Poly Adapter 37217 - The Home Depot
TEKTON 4734 1/2-Inch NPT Female by 1/4-Inch Male Reducer - Air Tool Fittings - Amazon.com
Grofry 1/4 inch NPT Male to 1/2 inch NPT Female Brass Pipe Fitting Reducer Adapter - Walmart.com
Buyers Products 2-in to 1-1/4-in Hitch Adapter with Corrosion-Resistant Zinc Plating - Easy Conversion, Durable Steel Construction in the Trailer Hitch Receivers department at Lowes.com
Milwaukee SHOCKWAVE 1/2 in. Square x 1/4 in. Hex Impact Adaptor 48-03-4410 - The Home Depot
Amazon.com: uxcell 1/2 Inch Drive (F) x 1/4 Inch (M) Socket Reducer, Female to Male : Tools & Home Improvement