Coarse, Fine, Self-Drilling & Hi-Lo. For Attaching Drywall to Wood or Metal Studs.
Coarse Thread Drywall Screws have wide-spaced threads and are standard for attaching Drywall to Studs. Fine Thread Drywall Screws have Twinfast Thread and are ideal for attaching Drywall to thin (20 -25 Gauge) Metal Studs. Self-Drilling Point Drywall Screws are used for thicker Metal Studs and High Low are similar to Fine Thread but require less driving torque and are more resistant to vibration.