Leader Trays 9-12 25mm based, are designed for games where leaders are randomly drawn: Sharp Practise, What a Cowboy for example. 

 Made from 2 layers of 2mm MDF the trays are engraved with Leader numbers 9-12

The 4 25mm bases are included 

Please see Leader Trays for models on HORSE pill bases and the "drilled" version of both styles.