WoodRiver Dust Connection - 1-1/4" ID to 2-1/4" OD Adapter Dust Collection Fitting
Reducer 1/2" Female to 1/4" Male Npt Pipe Adapter Male Female Thread Water Oil | eBay
EEEkit 4-pack 3/8" to 1/4" 1/2 inch Socket Adapter Reducer Air Impact Set for Ratchet Handles, Extension Bars Accessories - Walmart.com
Grofry 1/4 inch NPT Male to 1/2 inch NPT Female Brass Pipe Fitting Reducer Adapter - Walmart.com
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
Rockler Dust Port Adapter, 1-1/4'' Vacuum Wand to 2-1/4'' Port | Rockler Woodworking and Hardware
Force 80942 Socket Adaptor 1/2" - 1/4" - FORCE Tools - kepmar.eu
3/8 1/2 3/4 Drive Socket Reducer Air Impact Heavy Duty Ratchet Adapters New | eBay