Section 888.4300 - Depth gauge for clinical use(a)Identification. A depth gauge for clinical use is a measuring device intended for various medical purposes, such as to determine the proper length of screws for fastening the ends of a fractured bone.(b)Classification. Class I (general controls). The device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter, subject to the limitations in § 888.9 .52 FR 33702, Sept. 4, 1987, as amended at 66 FR 38815 , July 25, 2001