Product Reference: S-470
Starrett's stair gage fixture attachments clamp to a framing or rafter square forms a handy gage for laying out stair stingers, hip, valley, and other rafter cuts plus many unusual cuts.
These fixtures have a smaller area that contacts the square blade.
Fixtures are convenient, small in size and are lower in cost.
Slotted to keep two opposite hexagonal faces at right angles to the edge of the square for true work contact and positive alignment with graduations
They are nickel plated hexagonal steel for strength and resisting rust with a brass clamp screw to prevent marring the blade.
Furnished in pairs one right and one left hand.
Length is 3/4" and width slot is 3/16"