50/100 Set Self Drine Screw Screwdriver for Drywall Roots for Drywall Pins Expansion Nails for Drywall Pins

20/50/100 set self-tapping anchors self-drilling drywall anchors widening drywall nails heavy metal studs Features: [Expansion design] The cleft in ribbed anchors expands from two opposite sides as you tighten the screw, increasing the holding force. Serrated on both sides to increase metal hanging anchors to 66 pounds. [Premium quality materials] Made of carbon steel with zinc for strong structure and maximum durability. [Free drilling] No need to drill holes on the wall. Only (1-2mm) wide section on the wall when removing the anchor, will not destroy the wall. Prevent wall damage and no hole left after use. [Easy to use] Compared to the convention of a plastic anchor, self-drinching anchor bolts with tapered skull-shaped sharp ones allow for easier assembly and disassembly, saving energy. [Wide application] Deep thread construction provides strong commitment to 1/4 ", 3/8", 1/2 "or 5/8" gypsum boards, drywall, light brick wall board, etc. It works great for hanging all kinds of items on home decor, such as photo frame, wall lamp, curtains, clock, plants, etc. Specifications: Name: expansion nails Material: carbon steel, galvanized Type: 12 MM X 30 MM, 12 MM X 40 MM Qty:20pcs Package includes: 20pcs * self-drilling anchor screws