M14 Female to 1/2 inch 1/4 inch M10*1 Male Pressure Gauge Fittings,M20 Female to 1/2 inch 1/4 inch Male Pressure Gauge Adapter|Pipe Fittings| - AliExpress
Dust Fitting Adapter for Shop Vac 1-1/4 in to 2-1/4 in Diameter Hose - Walmart.com
Dewalt-DW2547IR Impact Ready 1/4 In. Hex Shank to 1/2 In. Socket Adapter - Walmart.com
MILWAUKEE Impact Socket Adapter Set, Black Oxide, Input Drive Shape Hex, Input Drive Size 1/4 in - 19RK08|48-32-5033 - Grainger
GRAINGER APPROVED Reducing Adapter: 1 1/4 in x 1 1/2 in Fitting Pipe Size, Schedule 40, Male NPT x Female Socket - 22FJ14|436169 - Grainger
Apex - 1/2 Socket Drive to 1/4 Hex Female Quick-Release Square-Drive to Hex Bit Adapter - 06699367 - MSC Industrial Supply
CR V Steel Socket Ratchet Converter Adapter Reducer 1/2" to 1/4" 1/2" to 1/4" Car Bicycle Garage Repair Tools Small Socket Tools|Sockets| - AliExpress
DeWALT 1/4 in. Hex Shank to 1/2 in. Socket Adapter, DW2547IR at Tractor Supply Co.