Bleeding although seemingly barbaric by today's standards, was a common practice in the 1800's. These bleeding tools actually have a reasonably high degree of collectibility in today's marketplace. They are typically brass and some type of tool steel. They can come with single blades or multiple blades. And I have seen them show up just about anywhere. Keep an eye out for them because they are definitely a cash it it item. They will sell quickly for around $60 for a very simple one blade tool and can reach into the hundreds for good condition multiple blade tools. Provenance can also add to the price. Identifying the original owners can add to the price.