Section 890.1450 - Powered reflex hammer(a)Identification. A powered reflex hammer is a motorized device intended for medical purposes to elicit and determine controlled deep tendon reflexes.(b)Classification. Class II (special controls). The device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 890.9 .48 FR 53047, Nov. 23, 1983, as amended at 84 FR 71818 , Dec. 30, 2019