Self-Drilling Drywall Anchor (Zip-It / EZ Ancor)
Direct Answer
The Self-Drilling Drywall Anchor (EZ-Ancor / Zip-It / WallDog) is a wide-threaded, pointed nylon, zinc, or cast alloy anchor that drives directly into drywall sheets using a standard Phillips screwdriver without pre-drilling. Its deep, aggressive external threads bite into the gypsum core, providing fast and clean installation for lightweight wall fixtures.
Source: ASTM C1002 / US Patent 4,601,625
Specs
| Material Options | Die-cast Zinc Alloy (high strength / fire rated) or Engineered Polyamide Nylon |
| Pre-Drilling Requirement | None (Sharp self-piercing tip and cutting flute drills its own hole directly through sheetrock) |
| Drive Recess | Phillips #2 / Pozidriv #2 / Slotted Combo |
| Mating Screw Required | Included #6 or #8 sheet metal/wood screw (typically 1-1/4" length) |
| Substrate Compatibility | 1/2" and 5/8" Gypsum Wallboard (Drywall/Sheetrock) |
| Safe Shear Load Rating | Zinc model: up to 50 lbs (23 kg) / Nylon model: up to 30 lbs (14 kg) in 1/2" drywall |
| Stud Collision Behavior | Zinc models can pierce wooden wall studs; nylon models will snap if driven into a hidden stud |
Fast One-Step Installation
Traditional wall plugs require finding a drill, selecting a masonry bit, drilling a hole, tapping in a plastic plug, and driving a screw. Self-drilling anchors streamline this to a single step: using a standard hand screwdriver or low-speed drill, the sharp tip punctures the drywall paper and threads itself flush with the wall in seconds.
Zinc vs Nylon and Stud Collision
- Die-Cast Zinc: Can screw cleanly through drywall and continue drilling into hidden wood studs behind the sheetrock.
- Nylon: Cheaper and non-conductive, but if it hits a hidden wooden or metal 2x4 stud, the tip strips and snaps off.