Backsaw

Backsaws have a stiffener along the top edge which helps to keep the blade straight and allows for closer control and fine work.

Tenon Saw	- the most common backsaw, typically 250mm or 300mm length with 10-14 teeth per inch (TPI) and used extensively for general woodworking and fine cutting of joints such as tenons.
Dovetail Saw	- similar to a Tenon Saw but shorter at 150mm to 250mm with finer teeth at 14 to 18 TPI and used for finer work such as cutting dovetail joints.
Gent's Saw	- or Fancy Backsaw - typically 150mm long with very fine teeth (16 to 25 TPI) and used for very fine cutting of mouldings and inlays for example.
Razor Saw	- commonly approximately 125mm long interchangeable blades with extremely fine razor sharp teeth (i.e over 50 TPI) and used for fine work in balsa and plastics - e.g. modelling.