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Shop All Spanner Snake Eyes Screws

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Security Drive Bits Sets Spanner Security Drive Bits

Spanner Screws

Tamper Resistant Screws with a "Snake Eye" Drive

Tamper proof security screws, or Tamper resistant security screws, are distinguished by having an unconventional drive, making tampering with the screw more difficult, if not impossible without the matching driver. Security Screws are used for securing materials from being tampered with, such as gutters, license plates, grills in jails, schools, boats and cars. They are also used in food prep and processing areas. You will often see security screws used in bathroom stalls, particularly toilet partitions and other public locations. Security screws in this selection are grade 18-8 or higher stainless steel, which prevents rusting and is corrosion resistant.

Tamper Proof Spanner or "Snake Eye" security screws are installed using a spanner bit. Spanner Screws are commonly referred to as "Snake Eye" because of the two dot drive system. Spanner security screws are used for securing materials from being tampered with, such as gutters, license plates, grills in jails, schools, boats and cars. They are also used in food prep and processing areas. You will often see security screws used in bathroom stalls and other public locations. Spanner screws can only be installed or removed with a spanner bit, which fits a pin into each of the screw's two drive holes. Since Spanner screws can only be installed or removed through spanner bits, they are very resistant to tampering.


FREE BIT INCLUDED WITH PURCHASE OF 25, 100, 250 or 1,000 PACKS OF SECURITY FASTENERS.

For more information on fastener types, grades, and materials, please visit our Fasteners 101 page here