REDUCED TO CLEAR - now half the original price!
These are very small rivets, with a stem length of 4.7mm, and a cap diameter which is also 4.7mm.
As with all tubular rivets, they're very easy to use - just punch a hole using a round punch or revolving hole punch, push the stem through your leather layers from the back, pop the cap on top, rest on a hard surface and hit the rivet cap with a small hammer. This flattens down the cap and closes the two halves together to make a join.
This size of rivet is suitable for leathers up to approx 3mm thick in total.