General description For use in structural applications, TIMCO FirmaHold Collated Clipped Head Plain Shank Bright Nails & Fuel Cells are designed with high-quality paper collation to reduce nail jams. Technical specifications Dimensions: 3.1 x 90 mm Type: Collated Clipped Head Plain Shank Bright Nails Other information Rust protection to comply with building regulations and meet service classes.