Snake-Eye

Also known as snake-eye or pig-nose screws, Drilled Spanner fasteners feature two small circular holes in the head that align with matching pins on a spanner driver. This recessed design prevents engagement with flat-head or Phillips screwdrivers and makes the fastener more difficult to remove without the correct tool.

These are commonly found in public restroom stalls, elevators, and electronic enclosures. However, spanner tools and matching screws are commonly sold through general retail and online marketplaces with no restrictions.

What We Thought

This fastener is widely available and lacks meaningful tool control or tamper resistance. While often marketed as a "security screw," it does not meet our standards for the security classification. It may deter casual tampering but offers very little protection against intentional removal.

Good For

General Fastener Use

Not Good For

Security Use

See Why

Product Facts

We compiled these "product facts" using publicly available information, expert analysis, and reasonable assumptions where data was incomplete. Some details (like pricing, torque specs, and break-in times) aren’t always disclosed, so we’ve filled in the gaps as accurately as possible.

For verified specs or specific use-case guidance, we recommend reaching out directly to the manufacturer.

Feature: Value
Driver Availability: Widely available; sold in stores and online.
Maximum Torque (MFR Claim): Moderate; varies by size and material.
Minimum Quantity: Low: Often available in small packs.
Average Break-In Time: Low: Easily removed in minutes.
Cost Per Fastener: Low: Varies by supplier, size, and material.
Samples Available: Likely available from distributors.
Keyway Type: Standard, not proprietary.
Tool Control: N/A: Bits widely available to public.
Head Style Options: Button, flat, pan, socket; varies by supplier.
Material Options: Steel, stainless steel (e.g., 304, 316), sometimes brass or zinc-plated—depends on supplier.
Reusability: Reusable with matching bit; integrity depends on torque and material.
Tamper Resistance: Low: Easily defeated with standard bits or modified tools.
Tool Compatibility: Compatible with standard bits; widely available tools.
Installation Method: Manual or power-driven with bit; standard installation process.
Visual Deterrence Level: Low: Recognizable shape signals basic security, not highly deterrent.
Removal Risk if Tool Leaks: N/A: Tool/Bit is widely available.
Lead Time to Purchase: N/A: Commonly stocked item.