Hillman Drive Wall AnchorsDrive Wall Anchors securely fasten fixtures to drywall with no pre drilling required. DETAILS STRONG HOLD: Spider like legs expand against the back of drywall providing a secure hold. LONG GRIP LENGTH: Accommodates wall thickness ranging from 5 8" to 1" (1 8" Long 100 Pc) EXTRA SHORT GRIP LENGTH: Accommodates wall thickness ranging from 1 8" to 1 4" (1 8" X Short 100 Pc) NO PRE DRILLING REQUIRED: Hole can be pre drilled if desired CORROSION RESISTANT