The gimlets are not for fuses, John, they are for clearing the vent hole of friction primer remnants or other fouling. The short, stubby ones not picturedbut that Dan references are woodworking awls and could work in the vent holes but weren't made for that purpose. One of the long ones shown here has Watervliet Arsenal stamped in the metal shaft.
#2 is a stadia sight -- an old fashioned range finder using geometric principles.