Watch Wrench | Watch Case Opener

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Delivery to: Mainland UK
Standard Delivery FREE Est. Delivery 6th-8th Oct
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Description & Details


  • Replace your watch’s battery with the Watch Wrench
  • Three gripping prongs for extra speed & stability
  • Interchangeable screw bits & prongs for different watch backs
  • Thumbwheel lets you open different-sized watches
  • Diamond patterned knurled handle for a secure grip

Watch Wrench | Watch Case Opener Description

From classically elegant Rolexs to modern timekeepers, there’s one thing that all watches have in common: they’re powered by a single battery, whose energy is slowly ticking away. And once it depletes entirely, replacing it can be a pain. Your only option is to take it into a watch repair shop… that is unless you’ve picked up the Watch Wrench from OnBuy!

An essential part of any watch repair kit, the watch wrench lets you open the back of rotary-sealed watches. Prongs grip the sides of the watch body, letting you turn the crank handle, slowly and safely twisting the back of the watch off. There are three prongs, which provide multiple contact points, letting you remove the back and replace the battery faster than other watch repair tools. 

This watch case opener is a great 2-in-1 tool! As well as the prongs for rotary-sealed watches you also get a set of antimagnetic screwdriver bits that allow you to remove the rear end of screwed watches. The screwdriver bits and prongs themselves screw in and out of the Watch Wrentch’s handle, letting you change them at will.

While all watches have batteries, few of them are exactly the same size. That’s why the Watch Wrench’s gripping arms are fully adjustable. A thumbwheel between the prongs and the handle allow you to quickly and smoothly move the arms apart or closer together, depending on the watch size. You couldn’t ask for a finer addition to your watch repair kit!

Like all good watch repair tools, the Watch Wrench keeps you in control when you’re working with brittle and delicate watch parts. The metal handle is covered in a diamond-patterned knurling gives you a superior grip than a smooth one, letting you apply the right amount of force needed to open your watches. 


  • Dimensions: W50 x L10 x H 150mm
  • Material: Alloy steel
  • Colour: Silver


  • 1 x Watch Wrench
  • 18 x Interchangeable screwdriver & securing prong bits

Manufacturer’s description:

Watchmaker Back Case Opener

Fits most screw back cases.

Fully adjustable via thumb wheel.

Knurled shaft for easy grip.

Antimagnetic screwdriver for removing battery covers.

Small, lightweight, easy to use and durable.


Codes 0701160669129 (EAN)
Rank #2 Repair Tools & Kits
#92 Jewellery & Watches

Detailed Product Information

MaterialAlloy steel

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  • New from £4.99
Delivery To: Mainland UK
Seller Ratings Warranty Returns Price Delivery Total Quantity
(2.2k reviews)
30 Days
Free Returns: No
£4.99 Free Delivery
Est. Delivery: 6th-8th Oct
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Product Reviews of Watch Wrench | Watch Case Opener

All OnBuy Reviews Are Verified

Overall Rating:
5 Star
5 Reviews
4 Star
1 Reviews
3 Star
0 Reviews
2 Star
0 Reviews
1 Star
0 Reviews
Most Helpful Review
M. Lambourne
Posted 23/08/2020
Watch repair kit
This is a very good kit enabling anyone to remove the back cover of a wAtch to fit a new battery or carry out any other repairs that are necessary Excellent value for money
Filter Reviews
M. Clark
Posted 25/08/2020

Money saver

I'm very happy with my purchase it's going to save us a fortune on replacing batteries by ourselves and not having to take it to the shop.
M. Lambourne
Posted 23/08/2020

Watch repair kit

This is a very good kit enabling anyone to remove the back cover of a wAtch to fit a new battery or carry out any other repairs that are necessary Excellent value for money
Posted 21/08/2020

Watch back Remover

The product was all metal. It had several different heads to fit different sized holes in the watch back.
I found it mdid the job well in my case. I fitted the ccorrect heads and the wheel adjustment allowed me to get each head s securelyseated in the watch back hols.

The product is quite weighty ( which is good ) and I then turned the wrench slowly and removed the back safely.

A wastch holder would be my next buy as this would make the whole operatioon even easier I feel.

Overall a good product at a reasobnable price.
R. Keyse
Posted 17/08/2020


Great product, did the job easily. First class service. I normally have to pay around £50 - £60 to have a batter fitted in my TAG Heuer watch, but a £3.00 battery and this tool saved me a fortune.
M. Allderidge
Posted 15/08/2020

Watchback opener

Took my Omega f300 watch to a battery replacement shop who did not have the right tool to unscrew it. Got my OnBy tool very promptly and did the job myself. Very good!
B. Evans
Posted 19/06/2020


Good, as described.

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