CFR › Title 21 › Part 882 › §882.437021 CFR §882.4370Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)Identification. A pneumatic cranial drill motor is a pneumatically operated power source used with removable rotating surgical cutting tools or drill bits on a patient's skull.(b)Classification. Class II (performance standards).