DMM - Big Boa HMS
DMM - Big Boa HMS
DMM - Big Boa HMS
DMM - Big Boa HMS
DMM - Big Boa HMS

DMM - Big Boa HMS

£19.80 £16.50 translation missing: en.products.general.regular_price £22.00 £18.33
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5 In Stock, Free UK Delivery on Orders Over £50

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Product Details
Large radius and gate opening (24mm) aluminium karabiner. Now available in Quicklock and Triple-Action gates Conformity: EN362:2004/B Major Axis Strength: 25kN
Shipping & Returns


Most orders received by 3pm Monday - Friday are despatched the same day, otherwise they are despatched the next working day.

UK shipping is FREE for orders over £50 (inc VAT) and is by Royal Mail 2nd class, which takes 2-3 days.

Orders of over £120 (inc VAT) are shipped on a next day courier service free of charge. Our courier is DHL, who will send order notifications by email and SMS, so you always know where your parcel is..

If your order is under the £120 limit you can upgrade to a courier service for a small fee, or to Royal Mail 1st class for an even smaller fee.


International orders are usually shipped with on an Express Courier Service. We use different couriers depending on the destination country but this is mostly DHL. On most occasions international orders are delivered in 2-4 days.

Our international shipping prices are very low and can be calculated on the cart page.

Please note, if you are ordering from a country outside the EU or EEA we will not charge you VAT (sales tax).
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If you wish to cancel within 7 days of receiving your order just contact us by e-mail or telephone to organise. Once we receive your return the refund will be processed, where possible, within 24 hours.
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Product Reviews Reviews

4.88 Average

8 Reviews


This is my 2nd Boa. Find the size to be useful for trad/alpine/winter.


Great carabiner that I keep going using over and over for just about anything. Its big enough to get a fair amount of rope amd easy to handle. I'll use it in the summer and winter, although not the lightest, strong and reasonably priced.

Daniel M.

very good krabs which i use a lot! nice size and good value


Not the lightest but worth the extra weight, can comfortably take 2 or 3 clove hitches depending on your rope width. I always carry one for building a belay.


This screwgate is so big I can fit all of my keys on it, even if I do look like an idiot with it hanging from my trousers. If you do decide to use it for climbing though, it makes for excellent trad belays and swallows up all of the clove hitches you can throw at it.

Daniel Clark

An amazing HMS for rigging anything that might want more than one rope through it, it hangs perfectly and will happily take 3 clove hitches when setting up a trad belay. A tiny bit on the heavy side but I don't go anywhere without a couple on back of my harness, it's so versatile I even use it for standard top rope belaying in the climbing center, which might be a little overkill, but it's definitely worth the price

Clive B.

A large smooth crab, for a few clove hitches. I have a few on my harness ;)

mat f.

strong has a huge opening and has plenty of room for many nots on if necessary. if you need a big bina this is it.

DMM - Big Boa HMS has a rating of 4.93 stars based on 8 reviews.