Tapestry beaters are perfect for tapestry looms and other small looms when you're weaving a weft-dominant or weft-faced fabric.
 
Schacht's Duet beater comes with interchangeable metal combs, set at 8 ends per inch and 12 ends per inch. To change combs, just loosen the screw in the handle, swap out the comb, and then retighten the screw.