6-lobe T40 drive provides positive engagement that makes the screw easy to drive and improves bit life (replacement driver bit — BIT40T-134-R2), Double-barrier coating provides corrosion resistance equivalent to hot-dip galvanization, making it suitable for certain exterior and preservative-treated wood applications, as described in the evaluation report.
- Bold thread design provides superior holding power.
- SawTooth® point ensures fast starts; reduces installation torque and eliminates the need for predrilling in most applications.
- Underhead nibs allow for head to drive flush to surface with reduced splintering.
- Large washer head provides a large bearing area.
- Size identification on all SDWS screw heads.