Security Nuts, more commonly referred to as spanner nuts or snake eye nuts, are specialized fasteners featuring a distinctive two-hole pattern on their surface. These unique nuts require a specific spanner tool for installation and removal, making them highly effective for securing large-scale items.

The specialized spanner driver, which must be purchased separately, is the only tool that can properly engage with the nut's distinctive design. These nuts are particularly valuable in public settings where preventing unauthorized tampering is crucial, such as mounting signs, securing lighting fixtures, or protecting display installations. Their tamper-resistant design significantly reduces the risk of theft or vandalism in public spaces.