Distribution of the temperatures and ﹩v\sin i﹩ values adopted for the templates of the Hyades members in our survey. The shaded area (as per A. C. Beyer & R. J. White 2024) marks the “Kraft Break” (R. P. Kraft 1967), where stars transition from slow to rapid rotation as their outer convective envelopes disappear, and magnetic breaking becomes ineffective. The two objects that stand out on the cool side of the break are spin–orbit synchronized stars belonging to the shortest-period binaries in our sample: V471 Tau (the K dwarf in a system containing a white dwarf; P = 0.52 day) and LP 413-19 (both components shown; P = 0.48 day).