Supplies Depot: Klein 65064 2-in-1 1/4 inch and 5/16 inch Nut Driver
Klein Tools 646-1/4M Nut Driver, 1/4-Inch Magnetic Tip Nut Driver with 6-Inch Hollow Shaft, Cushion Grip Handle : Tools & Home Improvement - Amazon.com
2-in-1 Nut Driver, Hex Head, 1/4-Inch and 5/16-Inch - 65064 | Klein Tools
Klein Tools 11/32-Inch Nut Driver, 6-Inch Shaft S116 | Zoro