Flanged and surface-mount enclosures attach to walls, panels, or chassis through external mounting flanges, so the sealed body never gets drilled. Solidshell's SF and SE flanged series include corner-located through-holes that preserve the IP rating once bolted down.
Common in solar inverter junction boxes, industrial PLC cabinets, telecom street cabinets, and any deployment where the cover may need periodic service without disturbing the wall fixing.