They are thus small in length, as they do not need to span a wide area as a jointer plane does.
They are also narrow in blade width, as they are meant for trimming the edges of thin boards, or for scrubbing small areas when graduating the thickness of arched soundboards.
To add mass to such a small plane, they are commonly cast in a dense brass or bronze alloy.
[3][better source needed] Wood-bodied, wedged-blade planes can be made fairly quickly, using a strong, seasoned wood for the body and either a blade for another plane or one reshaped from a chisel blade.
[1] Ibex is a common manufacturer of bronze finger-planes; they vary in quality, and some may need to be re-shaped to avoid clogging in use.