Image Item No. Description By  4274  Technic, Pin 1/2 without Friction Ridges Catalog: Parts: Technic, Pin 1  6558  Technic, Pin 3L with Friction Ridges Catalog: Parts: Technic, Pin 5  32556  Technic, Pin 3L without Friction Ridges Catalog: Parts: Technic, Pin 4  4459  Technic, Pin with Long Friction Ridges Catalog: Parts: Technic, Pin 2  2780  Technic, Pin with Short Friction Ridges Catalog: Parts: Technic, Pin 1  3673  Technic, Pin without Friction Ridges Catalog: Parts: Technic, Pin 2