CFR › Title 21 › Part 882 › §882.525021 CFR §882.5250Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)Identification. A burr hole cover is a plastic or metal device used to cover or plug holes drilled into the skull during surgery and to reattach cranial bone removed during surgery.(b)Classification. Class II (performance standards).