The #25-22 Grommet Pin is nickle plated steel. The #25-25 mounting base is die cast aluminum and uses an nickle plated steel pin.
Easy to Install
The #25-22 Grommet Pin requires drilling a 3/8" hole in the worksurface to accept the mounting bolt. The #25-25 Grommet Mount can installed several different ways. For solid wood tops, 4 wood screws will secure the base. For laminate worksurfaces, 4 through-holes must be drilled for machine screws (with washer and nut). In addition, a 3/8" hole is recommended for use with the center bolt to provide a solid connection to the work surface.