This is a heavy type (not a lightweight type). There are some scratches and scuffs as it is a used item. It was washed with neutral detergent and stored. ■Size Thickness of the bit: 1.6-1.7cm Length of the bit (bit size): 13cm Size of the ring (inner diameter): 6.5cm Thickness of the ring: 0.5cm *Please understand that this is a used item before purchasing.