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What the actual fuck is a 'S type' screw? What purpose does that have that another normal screw type cannot provide? What madness is this?!
Easy to screw closed but not open. Gotta think about it in 3 dimensions. They are used in US bathroom stalls.
Why though? Do they think a pervert will go and unscrew doors? I'd argue the occupant would notice before it's all unscrewed. Also, kicking it down might just be faster.
Cool concept though, but as person who loves repairing their stuff, I must say f it.
It's less pervert prevention and more vandalism resistance.
I firmly believe that without these screws, there would actually be less vandalism. Because of theft.
Ah I understand. So like people just unscrewing things out of boredom?
I've seen them used in power supplies that are not supposed to be user-servicable.
Stops tampering. Nowadays they have learned that people have hex sets so they are moving to security hex.
To elaborate: it's in 3d, the s curve is a ramp. The regular screwdriver slots in when turned clockwise, but has no purchase the other way round. It slips out because the ramp lifts the screwdriver out of the screw.
You can screw but can't unscrew because it lifts the driver.