Surface-Treated – Suitable for Outdoor Use The surface-treated screw has a corrosion class of C4, meaning it can withstand high stress and has a rust-protective coating, making it suitable for both indoor and outdoor use.
 
Countersunk Head with Torx Drive The screws feature pre-drilled cutting grooves, a T20 Torx drive, and countersunk heads. The countersunk head allows the screw to sit flush with the material, making it ideal for a less visible fastening. Bits are included.