|Description: A saw that has a wooden handle (dark) with two screws side by side to attach the metal blade. The blade is long and narrow, with small jagged teeth. |
A keyhole saw is a long, narrow saw used for making small incisions that cannot be made with drills or auger bits due to size constraints. During the nineteenth century, these saws were referred to as a fret saw. There are typically two varieties of keyhole saw: the fixed blade type and retractable blade type. _http://www.wisegeek.com/what-is-a-keyhole-saw.htm_
For more information see: R.A. Salaman "Dictionary of Woodworking Tools: c.1700-1970" (Newton, Connecticut: The Taunton Press, 1990), 425.