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Insert the needle into the next hole from the front and, taking care not to pierce the thread with the needle, pull the thread toward the acute angle of the diamond hole, opposite the direction of stitching.

After passing the back needle through without crossing the threads, pull the threads from both the front and back to apply tension so the stitches don't sit loose.

(*If you pass the back needle through first, stitch so that the thread passing from the front crosses over the thread passed from the back.)

Applying even tension every time you tighten a stitch gives a neat finish.