Security screws and how to get them out
A tamper-proof head is just a shape a normal bit will not turn. Almost all of them have a matching bit available cheaply — the hard part is naming the shape you are looking at.
Identifying the head
- Torx with a pin in the middle — security Torx, written TR or T-pin. A normal Torx bit will not sit down.
- Five-lobed flower — pentalobe. Common on phones and some laptops.
- Three wings from the centre — tri-wing, common in games consoles and appliances.
- Three-point Y shape — tri-point Y0/Y1, used in watches and small electronics.
- Two small round holes — spanner head, also called snake eye, used in public fittings.
- Slot with one flat side per wing — one-way, designed to drive in and never come out.
- Square with rounded corners — clutch head, older appliances and vehicles.
Getting the right bit
A precision bit set with security Torx, pentalobe, tri-wing and tri-point covers almost every consumer device. Choose one with a knurled body and a spinning cap so you can keep the bit straight.
Bit fit matters more with these than with ordinary heads, because the drive area is smaller and the metal is often soft.
When you have no bit
One-way screws: cut a slot across the head with a rotary tool and use a flat driver, or grip the head with fine pliers if it stands proud.
Security Torx: a normal Torx one size down sometimes works, or grind the pin out.
Last resort is a screw extractor, which drills into the head and backs it out with a reverse thread.
Fitting your own
If you are securing something in public — a sign, a locker, an outdoor enclosure — pin Torx is the practical choice: cheap, available in stainless, and awkward enough to stop casual interference.
Common questions
What screwdriver do I need for a pentalobe screw?
A pentalobe bit, most often P2 (0.8 mm) for phone bottom screws and P5/P6 for larger laptop cases. A Torx bit will round it out.
Are security screws actually secure?
They stop casual tampering only. Every common bit is sold openly, so treat them as a deterrent, not a lock.
Can I replace security screws with normal ones?
Usually yes, as long as the thread, length and head height match. Many people do this on a device they expect to open again.
Keep reading
Tools and screws for this job
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Metric screw assortment kit
One box covering the sizes in this guide
Precision driver and bit set
The right bit is what stops rounded heads
Digital caliper
Measure before you buy anything