Individual, double scribed aluminum mandrel pins from Pisoni keep the shape of the reed throat consistent as the reeds dry.
There’s no specific base for these pins. You can either fit them to a base you create, or use them without a base. (These do not fit the Rigotti mandrel handle/base nor the Fox Combo Tool.)
$1.50 per pin. Discounted price of $1.30 per pin for quantity of 50 or more. Made in Italy by Pisoni.