These 1/4 turn panel fasteners feature no slip installation and removal with their all the way through 3/16" hex hole. These panel fasteners can be installed and removed using a standard 3/16" allen wrench. 1/4 turn. No more slipping and gouging paint or graphics. 3/16" hex hole allows for positive, no-slip installation and removal. Can be used with a standard 3/16" Allen wrench. Hex hole goes all the way through, its impossible to get plugged with dirt, and is lighter than other fasteners.