JT732 Perfect Half-Square-Triangle (HST) Ruler
The all-in-one tool to create perfect half and quarter-square triangles. For quarter-square triangle blocks place two half-square triangle blocks right sides together. No need to mark or trace. 1/4 inch seam allowances on all sides interior and exterior. Teardrops allow for complete corner cut of interior square. Three colour grid markings for easy-to-read dimensions; black = 1 and 1/2 inches, teal = 1/4 inch and magenta = 1/8 inch. 45 degree markings to visually square block designs.