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Product Details

Zinc plated hexagon steel with slightly offset handle.

Technical Specification
Brand Monument
Manufacture ID 2054X
Type Spanners
Type Hex
Delivery details
Order value: Under £10 £10 & over
Express usually Next Business Day before 6pm £5 Free
Turbo usually Next Business Day before 12 noon £10 £5
Remote areas standard delivery (2-4 days) £5 Free
Order Value: Under £25 Over £25 but less than £75 £75 & Over
£10 £5 Free

Please note items delivered by our suppliers are not available for the options above. Delivery times may vary.

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Click & Collect details
If you are using our Click & Collect service please note the following:
  • Order online or over the phone and collect in branch from 5 minutes later.
  • Ensure you check stock is available for collection at your chosen branch.
  • Check branch opening hours to ensure you have sufficient time to collect.
  • For items not available for same day collection, place order before 9pm Mon-Fri (4pm Sun) and you can collect Next Business Day (Mon-Fri) after 3pm.
  • If we have your mobile number, we’ll send you a text when your order is ready to collect.
Valve Spanner & Air Release Key 12mm Hex is rated 3.2 out of 5 by 6.
Rated 5 out of 5 by from Sturdy tool that does the job! I bought this about a week ago after discovering that my new radiators had a 12mm hex socket and my tool was an imperial half inch that wouldn't fit. This was a nice tight fit in my radiator tails and, being a round bar, felt really sturdy when making the final tightening. The radiator vent key is a bonus doesn't suffer from the weaknesses of traditional vent keys. Overall, a great tool to add to your plumbing toolbag!
Date published: 2019-10-22
Rated 3 out of 5 by from Not sure... Bought this but it didn’t fit the 12mm radiator connector I was trying to undo. I don’t know if it’s the fault of the spanner or the radiator, so can’t complain really.
Date published: 2017-12-25
Rated 3 out of 5 by from Plumbing can be infuriating! What constantly amazes me is the lack of standarisation in the UK. Having bought a set of radiator valves confident in the knowledge that I have a half inch radiator hex key in my tool kit, I discover that the radiator valves which I purchased happen to require a 12mm hex key... Why is it that Toolstation treats these two variants as alien to one another? If you search for 'radiator hex key', you get this one - which fails to even mention that it is 'half inch' size: https://www.toolstation.com/shop/Hand+Tools/d10/Plumbers+Tools/sd210/Radiator+Hex+Key/p26053 On the other hand, you specifically have to go hunting for a 'radiator spanner' to discover the 12mm version - which I am 'reviewing' - and which pops up on an entirely different page. Bonkers!
Date published: 2017-11-18
Rated 5 out of 5 by from Great fit This is a 12mm radiator key and was perfect for the job of fitting the radiator tails to my new designer radiators. Nowadays, many valves and radiator tails from continental Europe are 12mm whereas English ones are 1/2" (12.7mm). You need the right sized key for the tail you are tightening! So I ignored the misleading review of this product - Toolstation also stock a 1/2" key if this is what you need.
Date published: 2017-07-27
Rated 1 out of 5 by from Terrible item Do not buy if you intend to use it with 1/2" rad tails as this is 12mm and doesn't fit properly so when you tighten it and it starts to grab the key just slips. Useless piece of kit not sure why they sell it really!
Date published: 2017-06-22
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