Round metal eyelet to be screwed 3 cm.

Price for a 1 piece:

Outer Diameter: 28 mm, 2.8 cm;
Inner Diameter: 16 mm, 1.6 cm;
Exterior thickness: 7 mm;
Interior Thickness : 3 mm.
Weight: 15 g per piece,

Ring, metal eyelet, to be fixed by screwing them into each other.
It is advisable to use a reinforcement for the fabric and it is best to glue before riveting.
To pass the lanyard, the cord of the bag.
Very nice quality.