Research Your File Cabinet Model

The first step is to identify the make and model of your file cabinet lock. On most standard vertical filing cabinets, you’ll find a brand name and model number stamped near the lock or along the interior frame.

Popular lock types include:

• Simple cam or wafer locks – These have a cylindrical keyhole and are the easiest to pick open.
• Tubular locks – Identified by a tubular cylindrical keyhole. More difficult to pick than wafer locks.
• Disc detainer locks – Use stacked metal discs inside. Most secure but can still be picked with specialized tools.

Knowing the lock type will allow you to purchase or fashion the proper picking tools. If no model markings are found, assume a standard pin tumbler or wafer lock.

Try a Bump Key

A bump key is a specially cut key that can randomly unlock pin tumbler cabinet locks with a quick turning “bump” motion. It’s a gamble, but can save you time if it works.

To make a bump key:

• File down a blank key or metal piece to the maximum height for that keyway. All the cuts should be level.
• Insert the bump key and gently tap the back as you turn. The pins will briefly jump allowing the lock to open.
• Try multiple gentle bumps at different insertion depths to set the pins. Caution – too much force can break the key or lock.

Use Lock Picking Tools

A lock picking set specially designed for pin tumbler and wafer locks allows precise unlocking of file cabinets. Useful picks include:

• Hook pick – Reaches over the locking bar inside.
• Rake pick – Rakes across pins quickly opening the lock.
• Tension wrench – Applies turning tension to the lock.

Patiently insert each pick fully into the lock applying tension, then strategically lift pins until the lock rotates and opens. Practice builds the hand skills for smooth, quick filing cabinet picking.

Try a Locksmith’s Pick Gun

A pick gun is a fast unlocking tool professionals use. It has a tension wrench on one end and a vibrating pick on the other. Inserting the vibrating pick creates rapid lifting of the pins, allowing quick unlocking. Caution – Too much force can damage locks.

Drill into the Lock

As a last resort, use a drill to breach the locking mechanism. This permanently damages the lock but provides access.

• Mark the drill spot carefully using a center or hammer punch.
• Use a small diameter drill bit and drill slowly into the lock chamber.
• Insert a flathead screwdriver into the drilled hole and turn to disengage the lock bars.

Be very cautious when drilling metal locks to avoid damage beyond just the lock. This method destroys the locking mechanism for good.

Call a Professional Locksmith

For fast, reliable filing cabinet unlocking with no cabinet damage, call a certified locksmith. Experienced locksmiths have specialized tools to quickly pick difficult locks and can provide new lock installation if needed. This avoids lock damage and the risks of amateur lock picking.

FAQs About Unlocking File Cabinets Without Keys

How do I pick open a tubular file cabinet lock?

Use a specialized tubular lock pick set, apply tension with the wrench, then carefully lift the stacked pin discs inside starting from the rearmost disc. Go slowly to avoid over-lifting.

What tool is best for picking disc detainer cabinet locks?

Disc detainer locks require a specialized picking tool to rotate and align each disc properly. A dedicated disc detainer pick is the easiest way to successfully pick this type of high-security lock.

What can I use if I don’t have lock picking tools?

You can attempt unlocking with paper clips, bobby pins, or modified screwdrivers, but specialized picks are more effective. Visit a locksmith for professional picks or kits.

I’m concerned about damaging my file cabinet lock. What’s the safest method?

Calling a qualified locksmith is the best way to avoid lock damage. Their experience and proper tools allow clean unlocking without harming your cabinet’s locking mechanism.

Can I unlock my small personal safe using the same techniques?

Yes, most portable safes use standard pin tumbler or wafer locks. You can pick these open using the same picks and tension wrench technique as on file cabinets.

In Conclusion

Unlocking a metal file cabinet without its key is very possible for anyone determined to gain entry. Depending on your moral stance, it can be seen as either gaining access to your own locked belongings or an unethical unauthorized break-in. Regardless of intent, equipping yourself with the proper lock picking skills and tools outlined allows you to unlock office file cabinets and restore access when keys have been lost, stolen or misplaced. Just be certain you own or have lawful permission for the cabinet in question.