Mosaic Pin Used

Sorry about this last picture, it should be flipped. These are some of the basic parts of a knife.
1. Butt or Pommel: Can be steel or brass, used to balance the knife and sometimes for striking.
2. Rivet or Mosaic Pin: Used to attach or secure handle to the knife.
3. Bolster: a decorative piece between the blade and handle and sometimes doubles as a guard.