Cutting the fabric with precision is the first step to create well -flat quilts, well aligned points and parts that fit perfectly. The Spot on downs lenses allow you to see exactly where you aligned your fabric on your rule in giving you increased visibility to the most important point. For perfect precision, the spots on dodies are the ideal tool for you! The small lens measures 2.54 cm in diameter. The large lens has a diameter of 5 cm. On the center, the magnification is 3x. Place the spot on side adhesive down on your favorite rule in the place you want to enlarge. The reusable adhesive ring will prevent the spot on dowry from moving while you make specific cuts. The spot on dot remains in place until you remove it. Control it in its case after use. You can reactivate the adhesion of the Spot Dot by simply washing it with water and soft soap.