Build your own custom Frank Beltrame Classic Italian Automatic. To complete this kit you will need to also purchase the 23CM F.Ili Beltrame Handle KIT2. Then you push out the pivot, remove the plastic comb blade and put in this stiletto blade. Then you insert the pivot pin and peen an edge on it with a hammer. This is a genuine Italian blade auto blade marked Frank B that is 4" long when placed in the knife handle.