Williams 474 Adjustable Hook Spanner Wrench, 2 to 4-3/4-Inch,Black - Amazon.com
Martin Tools - 2″ to 4-3/4″ Capacity, Adjustable Hook Spanner Wrench - 88580220 - MSC Industrial Supply
Adjustable C Spanner Hook Wrench Chrome Vanadium 3/4-2"(19-51Mm)+2-4 3/4"(51-121Mm) Spanner Set-Used to Tighten Side Slot Nuts on Collars, Lock Nuts and Bearings - Walmart.com