The FIN/Trim's small trim head provides a clean finished look. The Zip-Tip allows for one step installation and no pre-drilling while the star drive eliminates stripping for improved productivity. Climatek corrosion resistant coating is ground contact lumber approved. Small Trim Head - Provides a clean finished lookZip-Tip-Allows for no-predrilling and one step installationStar Drive- Eliminates stripping for improved productivityW-Cut -Low installation torque allows for fast driving and ease of installESR-3201 Approved - Approved for trim applications