The Stanley FatMax Tenon Back saws have the following features:
Reinforced back for extra rigidity makes a straighter cut;
Handle screwed to blade for extra strength;
Finger rest - ergonomic design, useful for extra control when starting a cut;
Triple edged teeth cut on both push and pull strokes for ease of cutting;
Induction hardened teeth;
45° and 90° angle quick reference points;
Bi-material handle for improved grip and comfort.

The Stanley STA217201 FatMax Tenon / Back saw comes in the following:
Size 350mm (14 inch)
Teeth 11 tpi