Rex drive recess provides smooth engagement with high torque transmitting capability reducing operator fatigue, and extending bit life.; ; Brand Name: Senco Callout Size: No. 8 Length: 2 in. Drive Style: Rex Finish: Yellow Zinc Product Type: Wood Screws Number in Package: 1000 pk Indoor or Outdoor: Indoor and Outdoor Thread Type: Twin Thread Material: Steel Packaging Type: Boxed Head Type: Flat Head