How to Engrave Metal at Home: Mark Your Tools Against Theft

If you work out of a van, you already know why this page exists: tool theft is relentless, and both police crime-prevention teams and insurers keep repeating the same two-step advice — mark your tools with your details, and register them on a free property database such as Immobilise. Engraving your name and postcode into the metal at home takes a couple of minutes per tool with a handheld engraving pen, costs pennies per item after the tool itself, and turns anonymous kit into property that is harder to sell on and easier to give back to you when it turns up.

Why engraved marks beat stickers and paint pens

Police guidance on tool theft is blunt about the problem: officers regularly recover tools they believe are stolen but cannot prove it or trace an owner, so the kit never comes home. A visible, permanent mark changes that on both ends — it puts off the casual thief (marked tools are harder to shift at a car boot or on a resale app), and it gives police and second-hand dealers something to check.

The marking method matters, though. UV pens fade in months and washing; paint and stickers come off with solvent in seconds. An engraved groove is cut into the metal itself: to remove it, a thief has to grind visibly into the casing, which itself screams "stolen". That is why engraving is consistently on the police-recommended list alongside forensic marking kits.

What to put on your tools

• Name or company name + postcode. The standard police-advised format — enough to trace you, short enough to engrave on a drill body. House number plus postcode works too.
• Mark each tool in more than one place. One obvious mark as the deterrent, one discreet mark (inside the battery bay, under a handle plate) as the backup if the visible one is defaced. Keep a note of where each tool is marked.
• Do not forget the boxes and batteries. Cases, chargers and batteries walk as often as the tools. Soft plastic engraves even more easily than steel.

The right tool for marking steel at home

A cordless engraving pen is the practical middle ground for van kit: cheap vibro-etchers skate on hardened cases and produce scratchy marks you cannot read, while workshop machines make no sense for a one-van operation. The things that matter for tool marking specifically:

• Variable speed you can repeat. Drill bodies mix aluminium, glass-filled plastic and steel; each cuts cleanest at a different rpm. The ARROWMAX cordless engraving pen runs 6,000–25,000 rpm with an OLED readout, so once you find the setting that suits steel casings you can dial it back in for the next tool exactly.
• Carbide and diamond burrs in the kit. Its 42-bit kit includes the hard points that legible lettering in steel needs — ball burrs for letters, cones for tight corners.
• Cordless, and charges in the van. Magnetic USB charging off the same power bank you charge your phone with. New tool comes back from the merchant, it gets marked in the van before it ever does a job — the habit that actually sticks.
• Steady under load. The hollow cup motor keeps its rotation smooth when the tip bites, which is the difference between engraved lettering and a skidded scrawl on a smooth casing.

At £108.53 with free UK delivery, 30-day returns and a 12-month warranty, it is a one-off spend that marks every tool you own and every tool you buy after — compare that with what one unmarked, unrecovered drill costs to replace, let alone a van-load.

Step-by-step: marking a power tool

1. Clean and plan

Wipe the surface with isopropyl alcohol or meths so the burr does not skid on grease. Write the mark first with a fine permanent marker — NAME + POSTCODE — somewhere flat and visible.

2. Brace and cut the outline

Rest your forearm on the bench or tailgate, hold the pen like a fat biro, and trace the lettering with light, repeated strokes. Let the burr cut; pressing harder only makes it wander. On steel casings, a sharp carbide ball at a higher speed with two or three light passes gives a clean, readable line.

3. Go deep enough to survive

You want a groove you can feel with a fingernail — deep enough that it cannot be polished out casually, not so deep you are carving the casing. On thin sheet parts, several shallow passes beat one heavy one.

4. Repeat discreetly

Add the second, hidden mark: inside the battery bay, under a base plate, inside a case lid. Photograph both marks while you are at it.

5. Register everything

List the tools on Immobilise with serial numbers, your marks and the photos. Registration is free, police forces can search it nationally, and it is the difference between "recovered property, no owner" and a phone call telling you to come and collect your kit. Your records — receipts, serials, photos of the marks — are also exactly what an insurer wants to see with a claim.

Honest limits

• Hardened steel takes shallow marks. On hardened chisels or HSS bodies, expect legible but shallow lettering — fine for identification, not deep stamping. Mark the softer body parts instead where possible.
• Marks deter, they do not prevent. Engraving works alongside van deadlocks, emptying the van overnight and parking against a wall — not instead of them.
• A determined thief can grind a visible mark. Which is exactly why the discreet second mark and the Immobilise record exist: grinding one obvious mark does not clean the tool's identity.

Frequently asked questions

Does engraving tools actually deter thieves?

It reduces the resale value and raises the risk for whoever handles the tool, which is the deterrent that matters. Police tool-theft guidance recommends marking precisely because unmarked recovered tools usually cannot be returned or used as evidence.

What details should I engrave on my tools?

Your surname or company name plus your postcode is the standard advice — traceable, short, and quick to cut. Add your house number if space allows, and record where on each tool you marked it.

Will engraving void a power tool's warranty?

Marking the external casing for security is normal practice and expected by insurers and police schemes; avoid engraving over serial plates, vents or seals. If a specific manufacturer's warranty terms worry you, mark the battery, case and secondary surfaces first and check with them.

Do insurers accept engraved marks as proof of ownership?

Engraved details plus your Immobilise record, photos and receipts together make ownership straightforward to demonstrate. The mark alone identifies the tool; the paper trail proves it is yours — keep both.

Can I engrave hardened steel with a handheld pen?

Yes, for identification-depth marks: use a sharp carbide or diamond burr at the higher end of the speed range with light passes. For deep stamping in hardened surfaces you would need industrial marking kit, which is beyond what tool security requires.

Choosing between marking tools and wider engraving kit? Our best engraving pen uk guide compares the options honestly.