MDF® Babinski Buck Neurological Reflex Hammer with Built-In Brush for Cutaneous and Superficial Responses The MDF® Babinski Buck™ Reflex Hammer is a 5-in-1 multifunctional hammer designed to perform all reflex tests with less effort and greater patient comfort by combining the functions and features of an integrated Babinski-tip, dual-mallet Buck percussor, and built-in brush into one reflex hammer. The balance-weighted head is outfitted with large and small mallets constructed of TPR for precise percussions. The ergonomic chrome-plated brass handle, featuring a diamond-textured grip, is precisely balanced for increased control of percussion force. The built-in brush at the base of the handle can be easily removed to elicit cutaneous reflexes.