June Tailor Perfect Half-Square & Quarter Square Triangle Ruler 10-1/2'' x 12-1/2'' Ruler
The all-in-one slotted tool to create perfect half and quarter-square triangles. For half-square triangle blocks:MARK stitching lines; then sew.CUT stitched squares in half; then press open.SQUARE up blocks to size.For quarter-square triangle blocks place two half-square triangle blocks right sides together.