1-1/8" Blk Coarse Thread Drywall Screw W/ Bugle Head 1# Box Perfect for a variety of drywall applications Primarily used for attaching gypsum board to wood studs For attaching drywall to light-gauge steel studs Fine threaded screw, # 2 Philips drive head, Phosphate coated, Constructed of high strength steel, Black, 1-1/8" long. Perfect for a variety of drywall applications. For attaching drywall to light-gauge steel studs. Primarily used for attaching gypsum board to wood studs. Fine threaded screw. # 2 Philips drive head. Phosphate coated, constructed with high strength steel.