Spread glue exactly where you want it - without drips or sticky fingers. They speed up assembly time, while minimizing cleanup. To apply a quick evenly spread coat of glue, just squeeze the bottle while moving the roller across the wood surface. Applicator frame is nonporous polypropylene, so glue won't stick and scrapes off easily. Works with white, yellow or liquid hide glues. Containers hold 8 oz. of glue.