The ultimate tool for creating half-square triangle blocks! Mark stitching lines, cut sewn block in,half and square up - fast and easy with just one ruler.

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 triangleblocks right sides together.