1) Handsaw 
A backsaw is any hand saw which has a stiffening rib on the edge opposite the cutting edge, allowing for better control and more precise cutting than with other types of saws. Backsaws are normally used in woodworking for precise work, such as cutting dovetails, mitres, or tenons in cabinetry and joinery. Because of the stiffening rib, the backsaw...
• (n.) A saw (as a tenon saw) whose blade is stiffened by an added metallic back.
(from the article `saw`) Among the saws that are neither loops nor disks are three of the most common hand saws used by the carpenter: the ripsaw, the crosscut saw, and the ...
Back'saw` (băk'sa`) noun [ 2d back , noun + saw .] A saw (as a tenon saw) whose blade is stiffened by an added metallic back. 
[n] - a handsaw stiffened by metal along upper edge
saw (as a tenon saw) whose blade is stiffened by an added metallic back.
back saw noun a handsaw that is stiffened by metal reinforcement along the upper edge