These 42 gauge 3-barb needles are perfect for the experienced reborner. They are extra fine which makes it possible to root mohair with even smaller rooting holes. We recommend this needle for experienced reborners. When done well it looks just like the baby grew the hair with each little follicle poking through her gentle skin. Effective micro rooting requires a high quality needle that will grab only a few hairs at a time. These needles are the best 42 gauge 3-barb size out there and are perfect for high quality micro rooting.