Screws Product specifications for Screws. Click the link below each screw for product specifications DS – Carbon Steel Drill Screws Specification for Carbon Steel Drill Screws View Specification OPT – Optimaxx Performance Screws & Blades Specification for Optimaxx Performance Screws & Blades View Specification TTWS – Twin Thread Woodscrews Specification for Twinthread Woodscrew View Specification CSY – Pozi Chipboard Screws Specification for CSY CSK Pozi Chipboard Screws ZYP View Specification CSYTX – Torx Chipboard Screws Specification for CSYTX CSK Pozi Chipboard Screws ZYP View Specification TIMBERFS – Decking & Timber Screws Specification for TIMBERFS Decking & Timer Screws View Specification DW - Drywall Screws Specification for DW Drywall Screws View Specification STS - Self Tapping Screws Specification for STS Self Tapping Screws View Specification