General description For use in structural applications, the TIMCO FirmaHold Collated Clipped Head Ring Shank Firmagalv Nails are designed with high-quality paper collation to reduce 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.