[Selection of Matrix Bands]: Select the appropriate matrix bands and adjust its shape, usually by gently rubbing it with your finger to adjust its form to match the shape of the tooth. [Usage]: Use a needle holder or tweezers to hold the matrix band and adjust its position to make it fit closely with the tooth. [Material]: This dental matrix band is made of good quality stainless steel metal, corrosion resistant and durable (very light and soft). [Different Sizes]: 6 different dental sectional contour metal matrices of 50 pieces; 100 pieces sectional contour metal matrices with 2 loops. [Application]: easy to use, provides slight tooth separation. a