Precision Screwdriver Sets: The Bits That Actually Matter

Precision bit sets are sold on bit count, and a 120-piece set is mostly a display case. That is not a criticism — the extra bits cost the manufacturer very little and one of them will eventually be the one you need — but it does mean bit count is a poor way to choose between sets. What matters is which common bits are included, and the quality of the handle and the bits themselves.

The bits you will actually use

• Phillips PH000, PH00, PH0, PH1: the workhorses. Laptop and console screws are usually PH0 or PH00; glasses and small electronics go down to PH000.
• Torx T3 to T8: common in laptops, drives and some phones.
• Torx Security (with a centre hole) T5 and T6: used where a manufacturer would rather you did not open something.
• Pentalobe P2 and P5: Apple external screws.
• Tri-point Y000: inside many phones and some watches.
• Flat 2.0 mm and 2.5 mm: prying, adjusting, terminal blocks.
• Hex 1.5 mm to 2.5 mm: monitor arms, some peripherals.

If a set contains those, it will handle the overwhelming majority of consumer repairs. If it omits pentalobe or tri-point, it will not open several very common devices.

Bit material and hardness

Look for chrome-vanadium or S2 steel. The failure mode of a soft bit is that it rounds off inside a screw head, and once that has happened the screw is much harder to remove than it was.

Small screws in electronics are usually tight and made of soft metal, which means the bit must be a precise fit and must not flex. This is the one place where spending slightly more is clearly worthwhile.

The handle

A precision driver should have a spinning cap on the end, so you can apply steady downward pressure with a fingertip while turning with the other fingers. Without it, precision work is awkward.

Knurled grip, reasonable diameter and a magnetised shaft all matter. A magnetised shaft that holds the bit and the screw is the difference between a repair and forty minutes looking for a screw on a carpet.

Everything else in the kit

What often decides whether a repair goes well is not the drivers:

• Plastic spudgers and opening picks — metal tools mark cases and can short a live board.
• A suction cup for lifting glued screens.
• Tweezers, ideally anti-static.
• A magnetic mat or a compartment tray for screws. Screws are not interchangeable, and putting the wrong length back can go through a board.
• An extension shaft for recessed screws.

Working method

Photograph each stage as you go. It takes seconds and it answers every question during reassembly.

Keep screws in the order they came out, laid out in the pattern of the device, not in a single pot. Most laptops use three or four different screw lengths that look identical.

Press down firmly and turn slowly. Cam-out — the bit slipping and rounding the head — is caused by insufficient downward force much more often than by a bad bit.

Static

Modern components are more robust than they used to be, and static damage is still real. Work on a hard surface rather than carpet, touch a metal part of the case before touching a board, and avoid working in socks on a dry day.

An anti-static wrist strap is inexpensive and removes the question.

When to stop

If a screw is rounding, stop and get an extractor rather than continuing. If a ribbon connector will not release, stop and look up the mechanism — most have a small flip-lock that is easy to break by pulling.

Batteries in particular are worth respecting: a punctured lithium cell is a fire, not an inconvenience.

Buying

Check the bit list rather than the bit count, check the steel, check for a spinning cap and a magnetised shaft, and check what non-driver tools are included.

Bit lists are published in full on each product page in repair and cleaning. A set can only be returned complete and unused, so it is worth checking the list against the device you intend to open before opening the case.

Storage and losing bits

The case is part of the product. A set in a moulded tray with each bit in a labelled recess stays complete; a set in a tin stays complete for about a week.

Put a bit back before taking the next one out. It sounds pedantic and it is the only habit that reliably keeps a set usable after a year, because a single missing bit is usually the one you need next time.

Extractors and stripped screws

A rounded screw head is a common outcome and not a disaster. A small screw extractor set, or in a pinch a wide rubber band pressed between the bit and the head, will often turn a head that a bit alone will not.

What does not work is a larger bit forced in, which finishes the job of destroying the head. If a screw is not moving, stop and change the approach rather than the force — that is true of essentially every repair.