GN 23 leveling feet have a machined base and higher load ratings.
.JW Winco GN23-100-5/8X11-75-D1-U Leveling Mount The unique design of the base with the convex mounting area for the concave ended stud provides not only the ability for the stud to swivel, but also does not allow liquids to build up as it will with other ball socket leveling feet.