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The term Snake Eyes was initially used by Tamperproof to describe the two-hole drilled spanners. That started more than 40 years ago. The word comes from the dice game in casinos. When they first started selling the spanners, they discovered that customers frequently mentioned the snake-eye-shaped screws when describing the kind of screw they desired. The two spanner holes on Tamperproof spanners are drilled, which gives them their unique appearance. The drill holes for spanners enable a snug fit with the corresponding tools. When the screw is cold headed by other manufacturers, the holes are often punched. As a result, the driver bits may come out and the fit of the corresponding tool will be less secure. Even though they are sometimes referred to as Snake Eyes, they are not always the same thing.