Spindle Adapter to 1-1/4 in. x 8tpi at Penn State Industries
Amazon.com: uxcell 1/4 Inch Drive (F) x 1/2 Inch (M) Socket Adapter, Female to Male : Tools & Home Improvement
DAYTON, 1/2 in Compatible Shaft Dia, 1/4 in Shaft Extension Dia, Shaft Adapter Kit - 4X098|4X098 - Grainger
NEIKO 30223A 8 PC Impact Socket Adapter Set, Standard SAE Size, Cr-V Steel, Impact Driver
SharkBite 1/4-in OD Push-to-Connect x 1/2-in MIP Male Adapter in the Push to Connect Fittings department at Lowes.com
3/8" to 1/4" 1/2 inch Drive Ratchet Converter Socket Adapter Reducer Air Imp UB | eBay
DeWALT DW2547IR 1/4 in. Hex Shank to 1/2 in. Socket Adapter (Impact Ready) at Tractor Supply Co.
Impact Socket Adapter Set, PTSLKHN 3 PCS | 1/4", 3/8", 1/2" Drive, Socket Adapter for Drill, 3/8 to 1/2 Socket Adapter, 3/8 to 1/4 Socket Adapter, Adaptation to High Torque Impact Wrenches - - Amazon.com
U.S. Solid 2pcs Brass Pipe Fitting Adapter, Male Pipe x Female Pipe, 1/2" x 1/2", 1/2" x 3/4", 1/4"x 1/4", 1/4" x 3/8", 1/8" x 1/4", 1/8" x 1/8", 3/8" x 3/8" -