This is the Schacht weighted single-ended tapestry beater. All are made of hard maple and have a smooth Danish oil finish. The wooden teeth are set at five per inch.
The weighted beater has about five ounces of lead weight inserted into the end for tighter weaving.
 
Dimensions:

Weighted Tapestry Beater           8″ x 2.5″ x 1 .25″  8oz