• Dangerfield 'J-Tool' Reach-Through Door Thumbturn Opening Tool - Image 1
  • Dangerfield 'J-Tool' Reach-Through Door Thumbturn Opening Tool - Image 2
  • Dangerfield 'J-Tool' Reach-Through Door Thumbturn Opening Tool - Image 3
  • Dangerfield 'J-Tool' Reach-Through Door Thumbturn Opening Tool - Image 4
  • Dangerfield 'J-Tool' Reach-Through Door Thumbturn Opening Tool - Image 5
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Dangerfield 'J-Tool' Reach-Through Door Thumbturn Opening Tool

Dangerfield 'J-Tool' Reach-Through Door Thumbturn Opening Tool

£9.99
£9.99
Sale Sold out
In stock, ready to ship
Free UK delivery over £30 Royal Mail options 30-day easy returns European delivery available
Reach-through J-tool

A J-tool for authorised thumbturn reach-through work

The Dangerfield J-Tool is a reach-through door tool for suitable double-door gaps and internal thumbturn operation. It is a locksmith tool for authorised non-destructive entry where the door and lock layout allow the method.

J-toolshape
Thumbturnroute
Doorbypass
9.99GBP
Dangerfield J-Tool reach-through thumbturn tool
5/5 verified buyer
"Very good tool easy to use well worth the money"
verified buyer, 02/22/2024
5/5 verified buyer
"The tool is well made"
verified buyer, 11/14/2022
Why buy this

Buy this when the door gap gives access to the thumbturn

Some commercial double doors leave a narrow route to the internal thumbturn. A shaped reach-through tool lets a trained user operate the thumbturn without attacking the cylinder.

Reach-through method

Designed for suitable gaps between double doors.

Thumbturn focus

Targets the internal thumbturn rather than the keyway.

Non-destructive route

Useful when authorised access can be achieved without drilling or pulling.

Dangerfield J-Tool reach-through thumbturn tool detail
Use route

How to assess the door first

Check the door gap, thumbturn position, and authorisation before using the tool. Work slowly so the tool does not scratch surfaces or bind in the gap.

  • Confirm the gap and thumbturn layout.
  • Work gently to avoid door damage.
  • Use only for authorised entry work.

Helpful next step: bypass tools.

Product details

What to know before you choose

Brand Dangerfield
Product type Reach-through J-tool
Method Thumbturn operation
Door focus Suitable double-door gaps
Best use Authorised non-destructive entry

Use lock picking and entry tools responsibly, only on locks you own or have permission to work on, and check local laws before buying.

Questions

Quick answers

Is it for every door?

Only where the layout suits it. The gap and thumbturn layout must be suitable.

Does it pick the lock?

It leaves the keyway alone. It operates the thumbturn where access is possible.

Who should use it?

Trained users handling authorised door entry.

What should I protect?

Avoid scratching doors, frames, or hardware while working.

Add a non-destructive thumbturn route

For the right door layout, a J-tool can avoid unnecessary cylinder attack.

U

UKBumpKeys

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Free Shipping

Shipping Overview:

  • Daily Cut-Off: Orders placed before 16:00 GMT are prepared the same working day
  • Preparation Time: 0–1 working days (Monday to Friday)
  • Delivery Window: 5–10 working days after dispatch (Monday to Friday)
  • UK Delivery: Free shipping is provided on all orders within the United Kingdom

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30-Days Return

Essential Details:

  • Return Window: 30 days from the date of delivery
  • Restocking Fees: None
  • Refund Timeline: Usually within 7 business days
  • Return Shipping: Customers cover the cost of sending items back

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