Drilling stays in the installer's hands at the 2" size too: this 308-series bracket ships with an undrilled mounting plate, so fasteners land wherever an unusual wall material, an existing hole pattern, or a restoration layout requires — while keeping the configurable modular build at the larger rail size. Made from 316-grade satin stainless steel, marine-capable for damp and coastal settings, it receives 2" round tubing. Because the undrilled option shares the 308 modular system with the drilled and glass-mount brackets, a mixed job stays consistent from part to part. Part number 49-308U/2.