From DT Online
Backsaws have a stiffener along the top edge which helps to keep the blade straight and allows for closer control and fine work.
Features and Applications
|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 20 TPI) and used for finer work such as cutting Dovetail Joints.|
|Gent's Saw||- or Fancy Backsaw - typically 150mm to 200mm 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 to 150mm long interchangeable blades with extremely fine razor sharp teeth (i.e 40 TPI or more) and used for fine work in balsa and plastics - e.g. modelling.|
|Spear & Jackson 12-inch Traditional Brass Back Tenon Saw||Spear & Jackson Professional 10 inch Tenon Saw||Irwin Hardpoint Tenon Saw 10-inch/250mm||Stanley Clamping Mitre Box and Saw||Dovetail Saw||Gents Saw||Razor Saw|