These snap clips are perfect for hair extension weft wigs. These snap clips feature "u" shape teeth and length of 32mm. These snap clip are made of flexible metal with soft rubber backing which protects your natural hair from damage. Description 10pcs "u" shaped snap clips for hair extension flexible metal with soft rubber backing which protects your hair from damage small holes around the edges allow you to sew the hair onto the clip ideal for keeping wigs, toupees and hair pieces firmly in place a good help for your hair design size(l x w) approx. 32 X 15 mm color black material metal with baking finish package includes 10pcs snap clips.