Simpson Strong-Tie HWDA12SD Hollow Wall Drive Anchor 1/8" 1/8"-1/2" Grip (100) The HWDA hollow wall drive anchor permits installation in gypsum drywall without pre-drilling Installation: Drive anchor into gypsum drywall until head is flush with surface. Tighten screw to set anchor. Remove screw, install through fixture; reinsert screw into anchor body and tighten until snug against base material. Use caution not to over-tighten the anchor in drywall applications as this can cause crushing.

Simpson Strong-Tie HWDA12SD Hollow Wall Drive Anchor 1/8" 1/8"-1/2" Grip (100) The HWDA hollow wall drive anchor permits installation in gypsum drywall without pre-drilling Installation: Drive anchor into gypsum drywall until head is flush with surface. Tighten screw to set anchor. Remove screw, install through fixture; reinsert screw into anchor body and tighten until snug against base material. Use caution not to over-tighten the anchor in drywall applications as this can cause crushing.