Metal connector nail is designed to be used in 3 deg. metal connector tools for installing simpson strong-tie structural connectors like clips, straps, joist hangers and more. Since the installation of this product is usually done close to the face these nails have a paper tape as opposed to plastic that breaks off and poses a hazard to the eyes and face. Additionally they are heat treated to prevent bending during installation.
Bostitch MCN connector nail for use in the Bostitch metal connector nailers