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One way screws, also referred to as one-way security fasteners, are threaded fasteners used in affixing materials with no intention of removing them. These tamper-proof fasteners are typically driven in using a wide slotted screwdriver, but due to the contour of their heads, drivers will slide out, preventing the reversal or removal of the screw. One-way screws or security crews are commonly used security gates, safes, bathroom partitions, and other installations in public areas.