A diz is used for combing top to prepare fiber for spinning worsted yarn. This bamboo Diz for Spinning from Katrinkles is laser cut with three precise hole sizes to pull your fiber through: 1.5mm, 3mm and 5mm. It is 2" x 3" and cut from 1/8" bamboo. Each piece is hand sanded after laser cutting to smooth out corners and edges. Because it is made of a natural material, the appearance of each needle gauge may slightly vary. Bamboo plywood is sustainable and is stronger than wood. Your needle gauge won't be indestructible but can withstand more than a needle gauge made of birch.