Grafting is a technique for finishing the tops of socks and mittens.
If you’ve been knitting on four needles, when you finish decreasing to form the toe, divide the remaining stitches equally onto just two needles.
Break the wool, leaving a long tail.
Lay the work on a flat surface.
Using a darning needle with a large eye, pick up one stitch from each needle, pull the wool through them from front stitch to back and pull them off the knitting needles together.
Continue across the row until all the stitches are held by the “tail”.
Draw the thread tight. Turn the sock inside out and anchor the thread across a row of knitting to secure, in the same way you normally finish off a seam.