The head is 2.17 inches across, wide enough to clear a heel in a handful of passes rather than dozens. The handle is waisted through the middle so it stays put in a wet hand, and the blade does the work — you guide it, you don't press.
The precision blade sits recessed in the head with only a fine edge exposed, so it glides across the surface and lifts the hardened layer away in smooth passes. Flip it over and the micro-textured back face polishes what's left.
The head lifts straight out and drops back in with no screws and no tools, so when it stops working as well you refresh it for pennies instead of buying a whole new device. Nothing to charge, no cord, no motor to burn out.
