Backsaw

A Backsaw is any of several types of hand saws used in woodworking which have 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 for precise work, such as cutting dovetails, mitres, or tenons in cabinetry and joinery. Because the stiffener is thicker than the blade, the backsaws are limited in the depth to which they can cut. Backsaws usually have relatively closely-spaced teeth, often with little or no set.

The origin of the Western backsaw is unknown, but it dates at least to Roman times. The Japanese Dozuki, itself a type of backsaw, is likely to have a different origin to the Western version however it shares common characteristics.