Blog
Hook Pick Sets: 0.5 mm to 6 mm Stainless Steel Picks
A hook pick is a small, sharply bent steel point on a handle, and it does jobs that no other tool in the box reaches: lifting an O-ring out of a groove, hooking a seal lip, pulling a wire out of a connector shell, clearing a burr from an internal thread. The picks in this range run from a needle-fine 0.5 mm tip up to a robust 6 mm point, all in stainless steel, and the whole set costs about the same as a single screwdriver, which is why most workshops keep a set rather than one pick.
What decides which pick you reach for
- Tip diameter. The tip has to fit the gap it works in. A 6 mm point will not enter an O-ring groove; a 0.5 mm point will bend under any load.
- Hook shape. A straight pick, a 45 degree bend, a 90 degree hook and a full circle each reach a different place. The set covers all four so the tool matches the access, not the other way round.
- Material and hardness. Stainless steel resists corrosion and the coolant and oil that picks live in. Hardened tips hold a point; soft tips roll over.
- Handle grip. A textured handle with a small diameter gives the control these tools need. Too fat and the fine work becomes clumsy.
- Tip length. A longer, thinner shank reaches deeper into a housing but flexes more. Short shanks stay rigid.
- Force you intend to apply. Picks are for lifting, guiding and probing, not for levering. A pick used as a pry bar bends at the shank.
Tip size against the job
| Tip | Best at | Typical access | Limit |
|---|---|---|---|
| 0.5 mm to 0.75 mm | Wiring looms, tiny O-rings, connector pins | Very tight gaps | Bends easily; no load at all |
| 1.0 mm to 1.5 mm | Seals, small O-rings, injector plugs | Narrow grooves | Light pull only |
| 1.75 mm to 2.25 mm | General seal and O-ring removal | The common case | Will not shift a hard-set seal alone |
| 2.75 mm to 3.5 mm | Hose removal, larger seals, trim clips | Open access | Too big for tight grooves |
| 4.0 mm to 6.0 mm | Stubborn parts, clips, grommets | Wide access | Will mark soft plastic if forced |
Working down the sizes is the practical rule: start with the smallest pick that will do the job and step up only when the part genuinely will not move. Using a large pick in a fine groove damages the groove and the pick.
The hook picks in this guide
Every option in this range
Sixteen stainless picks covering 0.5 mm to 6.0 mm. Prices are per set of picks in that tip size.
| Option | Tip diameter | Material | Best for | Price |
|---|---|---|---|---|
| Needle pick | 0.5 mm | Stainless steel | Connector pins and fine looms | $8.99 |
| Needle pick | 0.75 mm | Stainless steel | Very small O-rings | $8.99 |
| Fine pick | 1.0 mm | Stainless steel | Seal lips and small grooves | $8.99 |
| Fine pick | 1.25 mm | Stainless steel | Injector plugs and seals | $8.99 |
| Fine pick | 1.5 mm | Stainless steel | General fine work | $8.99 |
| Fine pick | 1.75 mm | Stainless steel | Everyday seal and O-ring work | $8.99 |
| Standard pick | 2.0 mm | Stainless steel | The all-round workshop size | $8.99 |
| Standard pick | 2.25 mm | Stainless steel | O-rings and trim fasteners | $8.99 |
| Standard pick | 2.75 mm | Stainless steel | Hose and seal removal | $8.99 |
| Standard pick | 3.0 mm | Stainless steel | Trim clips and grommets | $8.99 |
| Standard pick | 3.5 mm | Stainless steel | Larger seals and hoses | $8.99 |
| Heavy pick | 4.0 mm | Stainless steel | Stubborn clips and grommets | $8.99 |
| Heavy pick | 4.5 mm | Stainless steel | Heavy seals and boots | $8.99 |
| Heavy pick | 5.0 mm | Stainless steel | Difficult trim and hose work | $8.99 |
| Heavy pick | 5.5 mm | Stainless steel | Wide-access removal | $8.99 |
| Heavy pick | 6.0 mm | Stainless steel | The heaviest removal work | $8.99 |
Because every size is the same price, the sensible buy is the set rather than a single pick. Individual picks get lost and the right diameter is rarely the one that is in the box.
Using a pick without breaking it
- Work around the part, not through it. The pick goes under the O-ring or behind the seal lip and lifts. Driving the point into the part damages the seal surface.
- Protect soft surfaces. A pick tip marks aluminium, plastic and painted surfaces. Where that matters, slide a thin shim under the pick or wrap the tip.
- Pull along the groove. Sliding the pick around the circumference of an O-ring lifts it evenly. Pulling straight out stretches it and can cut it.
- Change the angle, not the force. When a part will not move, a different hook shape usually succeeds where more pressure only bends the shank.
- Keep the tip clean. Grease on the point makes it slip out of a groove at the moment the load comes on, which is when fingers get cut.
- Do not lever with a pick. It is a hook, not a pry bar. Use a trim tool or a small screwdriver for anything that needs leverage.
Where a hook pick is the only tool that works
O-ring and seal removal is the classic case. The ring sits in a groove with almost no clearance, and the alternative to a pick is a sharpened screwdriver that gouges the groove and the bore. A pick with a fine tip slides under the ring and lifts it without touching the sealing surface.
Electrical work is the other. Connector housings hold their terminals with a small plastic latch that has to be released from the front. A 0.5 mm or 0.75 mm pick reaches the latch, depresses it and lets the terminal come out of the shell without cutting the wire or breaking the housing. The same pick straightens a bent pin, guides a wire back into a boot and clears potting compound from a terminal.
In assembly and inspection, picks clear swarf and burrs from internal threads, lift a stuck spring out of a recess and check that a hole actually goes through. None of these jobs is heavy, and none of them is possible with a screwdriver without marking the part. That is the niche the pick fills.
Care and storage
- Wipe picks after use. Oil and coolant left on a tip attract grit, and grit wears the point.
- Check the tip under a light. A bent or blunted point is easy to miss and it slips at the worst moment.
- Store in a roll or a holder. Picks thrown loose in a drawer find each other and every tip suffers.
- Replace rather than straighten. A pick bent at the shank will bend again in the same place and then snap.
Frequently Asked Questions
What is a hook pick used for?
Removing O-rings and seals, releasing connector latches, lifting clips, clearing burrs from threads and probing recesses that no other hand tool reaches.
Are stainless steel picks better than carbon steel?
For this work, yes. Stainless resists the oil, coolant and moisture a pick meets, and it will not leave a rust mark on the part.
What is the best pick size to start with?
Around 2 mm. It is fine enough for most grooves and strong enough to lift a seal without flexing away.
Can I use a hook pick on electrical connectors?
Yes, with the smallest sizes. A 0.5 mm or 0.75 mm pick releases terminal latches without damaging the housing or the wire.
How do I stop a pick from bending?
Use it to lift and guide rather than to lever, match the size to the groove, and never apply load with the shank at an angle.
Buying the right one
Buy the range rather than a single size, because the tip that is needed is rarely the one already in the box. The stainless hook picks in this range cover 0.5 mm through 6.0 mm.
