Modle 1-1 for 1 strands of hair ventilating, 1-2 for 1-2 strands of hair ventilating, 2-3 can pick up 2-3 strands of hair and 3-4 can pick up 3- 4 strands of hair, 2# can Repair Lace Wigs. those needle are most use din ventilating the middle and front hair line of wigs, toupee, closure . It's Great for Beginners or just Learning to Ventilate Lace Wigs. Now you can easily repair your lace wig by adding missing hair to Bald Spots or your Lace Wig Hairline just the way you want it. This Simple Ventilating Needle has a nice bronze Hook end with a Tiny Latch which Prevents the hair from Falling off the needle. It's much easier to use than Traditional German or Asian Ventilating Needles. Very easy to Master and you'll be Ventilating Much Faster! We have one of these needles that we personally use and we have used it with Both Lace And French Lace Caps. These item can be used for lace wig, skin, toupee and etc., easy to use. Name:Hook Needle Item Type: Wig hair extension hook Colour: silver Material: metal Package Contents: 15 * Crochet (1-1 1- 2 2-3 3-4 2# 3 each) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.