In a Vernier calipers, when both jaws touch each other, zero of the Vernier scale is shifted to the right of zero of the main scale and \( 7^{\text{th}} \) Vernier division coincides with a main scale reading. If the value of \( 1 \) main scale division is \( 1 \, \text{mm} \) and there are \( 10 \) Vernier scale divisions, then the Vernier caliper has
