Wing nut handles for 8mm and 7/16" (for ¼" fasteners) nuts. They just slide on top of a regular nut - gluing them on top of nut to keep them in place might be a good idea. I made these to go on top of hose clamp nuts. Handy. They will also work on any fastener nut as there is internal clearance for a bolt.
The author marked this model as their own original creation.