The U-bar digger (or broadfork, as it is sometimes called) has been written up in gardening literature and wanted by serious gardeners for many years.
Spading Fork - Lee Valley Tools
Valley School of Ligonier
Garden & Lawn Tools - Page 24 - Lee Valley Tools
Ho-Mi Diggers - Lee Valley Tools
Spading Fork - Lee Valley Tools
Review: Everysight Raptor Augmented Reality Cycling Glasses
How to Grow Root Vegetables - Lee Valley Tools
Returning to Blue Goose Farm for Season Two - Lee Valley Tools
Richard Pryor - Wikipedia
Ergonomische woelvork met verkriumelaar
Why I Ditched the Broadfork and Opted for a Game-Changing
5 garden tools that should be in every Sonoma County shed
Spring Clean Up - Lee Valley Tools
Garden & Lawn Tools - Page 25 - Lee Valley Tools