Bostitch pt series galvanisedplain nails and fuel boxes of 2200 bostitch pt28r50fc this box of 2200 pt series 28 x 50mm plain ring shank nails from bostitch comes with a fuel cell and can be used for situations when a nail needs to be applied for a long period of time without removing it manufactured to a high standard these particular nails have been designed with rings around the shanks surface making them more difficult to withdraw and ideal for exterior trim siding and sub floors