Make an assortment of frit and powder from scrap glass. Heavy duty all steel glass crusher, a two piece mortar and pestle will produce a batch of frit in 20 to 30 seconds. The crushed glass makes a full assortment of frit from powder to coarse. Accessory Frit Sorter/Sifter (Item #15351 sold separately) will sort out the crushed batch into 4 sizes from 5.20mm to .20 powder. It affords the opportunity to re-crush the larger frit to smaller sizes if desired.