I have seen many end scrapers and understand their use as mounted scrapers that were most likely used to scrape hides.  Nearly all measure 1 - 2 inches long, with only a few measuring longer than that.  The examples I have seen longer than an inch or two all have rounded ends.  I can understand why end scrapers with flat ends would do a good job scraping hides, but wonder what the ones with rounded ends would be used for.  They seem to have been intentionally rounded and that does not seem to be the best shape for scraping hides.  I wonder what one would scrape that would benefit from a rounded end as well as a small and large sized tool.  Below I have two sets of pictures one with flat ends and one with rounded ends.  The group with rounded ends includes a piece measuring 4" long. 

I would love to hear your theories and comments Gregory Dush