DOUBLE TREBLE CROCHET (dtr)
US term: treble crochet
This is a stitch regularly used as an elongated version of the treble (described above). It’s worked in a very similar way to the treble, as follows:
1 Make a foundation chain. Skip 4ch, *yrh twice, and insert the hook under the top loop of the next ch.
2 Yrh, pull the yarn through the ch loop only (4 loops on hook).
3 Yrh and pull the yarn through 2 loops only (3 loops on hook). Yrh and pull the yarn through 2 loops only (2 loops on hook).
4 Yrh and pull the yarn through the remaining 2 loops. Repeat from * to make more dtr sts.
5 To make the next row of dtr, turn work and ch4. This turning chain counts as the first dtr in a new row. Skip first st at the base of the t-ch, work 1dtr under the top two loops of the 2nd stitch in the previous row; continue to the end of the row.