Knit clips are used to hold two pieces of knitted or crocheted fabric while you sew them together. Clips can be small for fine fabrics or large for heavier fabrics. You can use clips or seaming pins. Clips will not slip through the fabric like a seaming pin might if you are slinging your work around while seaming or have to put it in a time out because it is misbehaving and you just can't take it anymore. You can also use them to hold back lose strands of hair if you are home alone or even in public if you just don't care anymore.