Pragmasis Super Shed Shackle review | Full destruction test

Date reviewed: December 2025 | Tested by: John Milbank | Price: £79.95 (RRP) | securityforbikes.com

With Bennetts motorcycle insurance classifying locked metal sheds, shipping containers and wooden sheds on a concrete base as garaged, the Pragmasis Super Shed Shackle is designed for those situations when you can’t bolt a ground anchor into the floor: if you keep your motorcycle or bicycle in a wooden shed, this could be the ideal extra layer of security…

Pros & Cons

Pragmasis Super Shed Shackle capacity

Made of hardened powder-coated steel measuring 7.8mm thick, the Pragmasis Super Shed Shackle is a simple yet clever design with an opening that measures 74.7mm wide by 51.8mm tall, which is enough to just about get a 22mm chain through if you rotate the links. This is excessive for an anchor like this, but a 19mm chain goes through easily.

You could also use a couple of smaller chains with the Super Shed Shackle – with some jiggling I was able to get a 16mm and a 13mm long-link Pragmasis chain in at the same time. Alternatively, if you position it carefully you might find that you can use it with a D-lock, though this will probably best suit locking a bicycle by its cross-bar.

Fitting

Pragmasis is well known for supplying pretty much all you need to fit its anchors, and the Super Shed Shackle includes not just the wood screws, washers, coach-bolts, shear-nuts and caps that make up the hardware, but an HSS drill bit and a Torx T20 hex bit. All you need to provide is a drill/driver and spanner.

Once you’ve decided where best to fit the anchor inside the shed (you also need to be able to access the outside of the wall), it’s a simple matter of screwing it to the timber, drilling the holes through and fitting the coach-bolts.

Needless to say, you need to use one of the uprights not just the thinner wooden walls, but once the M8 coach-bolts are passed through the shed from the outside in (with large square-holed washers backing them up), the shear-nuts are tightened on the inside then snap off, making them very hard to remove. Any excess thread is capped off with the supplied plastic covers.

As standard the Pragmasis comes with 80mm-long coach bolts, which are said to be suitable for most sheds but do check the thickness of the walls and uprights. A version with 90mm bolts is available for the same price, while one with 100mm fasteners costs just £2 more, and 130mm (with a longer drill bit) costs £5 more at £84.95.

Resistance to attack: sledge hammer

Despite a very sustained attack with a sledge hammer, the Pragmasis Super Shed Shackle held totally firm.

I attacked the anchor with it propped against a solid anvil on the ground, which allowed me to transfer far more shock into the construction than would be possible with it fixed to wood. Despite this, all I managed to do was bend the bottom (which wouldn’t happen when fixed to timber): the main arch didn’t deform at all. While the two sections aren’t tabbed together, the welds obviously have excellent penetration as I couldn’t get the thing apart.

To see how this compares with the other locks we’ve tested, check out our best motorcycle locks for home and away.

Resistance to attack: angle-grinder

The thick steel construction of the Pragmasis Super Shed Shackle makes it fairly time-consuming to cut with even a quality 1mm cutting disk, and two full cuts are required to get the chain out. Realistically, this will take longer than cutting most chains themselves, but it’s possible that if using something like a Hiplok DX1000 or a Litelok X3 with it, the Shed Shackle will be quicker to attack.

But that’s not to say it’s weak. The fact that you can just about get a 22mm chain into this anchor doesn’t mean it’s as effective as a well-made traditional device designed for a concrete floor, but it is very effective for what it’s intended for.

There’s no benefit to using a metal-cutting diamond disc on the Super Shed Shackle – while they can be quicker than abrasive discs in some situations, they tend to be slow on hardened steel.

To see how this compares with the other locks we’ve tested, check out our best motorcycle locks for home and away.

Bennetts BikeSocial test results

Product: Pragmasis Super Shed Shackle

Sledge hammer attack: PASS

Angle grinder attack: PASS

To see the other chains and locks tested by Bennetts BikeSocial, click here and be sure to regularly check for the discounts available through BikeSocial membership.

Pragmasis Super Shed Shackle review: Verdict

A typical ground anchor only needs to be as tough as the chain it’s securing, and it needs to be far too much hassle for a thief to remove. The Pragamasis Super Shed Shackle is a compromise in that with some determination the coach bolts on the outside of the shed could be ground off or the shear bolts cut away, then the screws inside removed with a Torx driver or the heads ground out, but this would be time-consuming and a real hassle for a thief who typically wants to get in and out as quickly as possible. Another option might be to attempt to cut the section of shed wall out, but this would be extremely noisy and require tools not typically carried by bike thieves.

If used with the thickest chains or an angle-grinder-resistant D-lock, the Shed Shackle could be the easier point of attack, but it’s still weak by any stretch.

If you want the most effective anchoring system then bolting into a solid concrete floor is almost always the best bet, but that might not be possible. Storing your motorcycle or bicycle in a decent locked wooden shed can significantly reduce the chance of it being stolen, which is why Bennetts classes them as garaged when the walls are fixed to a concrete base, or a wooden floor is fixed to the walls and the shed sits on concrete slabs. The Pragmasis Super Shed Shackle adds an impressive extra layer of defence that could make all the difference if you’re unlucky enough to have someone break in. This is a well-thought-out yet relatively simple solution that’s well worth the investment.

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