Seaming horizontal edges

How to use mattress stitch to sew two pieces of knitting together. This is the basic seam, super easy to do, and gives a professional finish to your knits! This video covers how to seam a cast-on or bound-off to another cast-on or bound-off edge.
Helpful Tools:
Bent tapestry needles: amzn.to/3Wfq0LJ
Straight tapestry needles: amzn.to/4dewyjt
Mini Clips: amzn.to/3JKzp6s
Clips: amzn.to/3WkKeUl
Scissors: amzn.to/4aj7ky5
Finishing School: amzn.to/4drg7AL