General description For use in structural applications, TIMCO FirmaHold Collated Clipped Head Ring Shank Firmagalv Nails feature high-quality paper collation that reduces nail jams. Technical specifications Dimensions: 2.8 x 63 mm Type: Clipped Head Ring Shank Material: Firmagalv (rust protection) Other information Rust protection complies with building regulations and meets service classes.