Screws for electrical boxes or conduit straps PACK OF 1000 SCREWS Wafer Head Self Drilling Screw, Steel material, #8 x 1/2 in. Size, Zinc Plated Finish, Phillips drive type, #2 bit size Finish Zinc Plated Length 1/2 Thread Size #8 Special Features Features: Self Drilling, Invincibox Up to 2 Inch, Tuff Pack Application For Removing Metal And Can Be Used In Heavier Gauge Metals Item Type Wafer Head Self Drilling Screw