Three-eighths glass is the common thickness for interior guards and partitions, and it needs a clip sized to it. The 813/03F holds a 3/8-inch tempered panel with a two-piece clamp that bolts flat to the mounting surface, so the panel can land on a wall, a ledge, a square tube, or the side of a counter. Rubber gaskets sit between the metal and the glass, and the clamp closes on the edge without drilling the panel. It is the middle size in the flat-clip trio: the 812F takes 1/4-inch glass and the 813F takes 1/2-inch. Polished brass suits a period railing and the brass fittings in the same line, while chrome gives a bright edge for a contemporary interior. Pair it with matching clips on the round posts elsewhere in the run so the hardware reads as one system. Ships from US inventory.