Used once, they show some signs of wear as shown in the pictures.   Complete with tools and fixings as well as a heavy-duty bag that can be split into two to facilitate different stowage options.    

I've included the full description below.  In summary, check the table in the photos to make sure your tyre size is covered by the F30.   Then the chains are adjusted to size by removing (or replacing) screws - its all pretty easy.    The chains don't extenda around the back of the wheel at all when installed.  I've fitted them to a Mercedes C250 and a Jaguar I-Pace (I only used them with the Merc).    They attach by clamping on top of one wheel unit, the design then automatically tightens them,   There are videos of how to fit/remove them.

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Weissenfels Clack & Go Quattro has been designed not only to be extremely simple and quick to fit but once fitted they automatically tension as the vehicle starts to move forwards. Since there is absolutely nothing that protrude behind the wheel, Weissenfels Clack & Go Quattro is ideal for fitting to passenger cars such as many of the models in the Audi, BMW and Jaguar ranges whereby often there is insufficient clearance behind the wheels to fit conventional wrap around snow chains. This means that that any obstructions such as brake components, steering, suspension parts or bodywork on the inside of the tyre are totally unaffected.

Weissenfels Clack & Go Quattro snow chains will fit virtually all makes and models of cars, crossovers mpv's and suv's up to a gross weight of 2500Kg. Since they incorporate a generous multi adjustable fitting system each chain size adapts to a huge range of tyre sizes, many more than with conventional snow chains. For example the entire range of tyre sizes is covered by just six Clack & Go Quattro chain sizes as compared to at least fourteen sizes with other models of snow chains that cover a similar range of tyre sizes.

The amount of grip on snow and ice is quite simply amazing. This is thanks, mainly due to the unique combination of a continuous 15mm square linked snow chain pattern which incorporates a series of special lateral steel traction plates across the tyre tread as well as a plentiful amount of hard wearing ice studs.

Once set up for your particular vehicle's tyre size (a simple once only procedure) fitting can be accomplished in a matter of seconds. The chain is simply attached to one of the car's wheel studs or wheel nuts using a special gripper collet. Once attached the chain assembly is placed over the tyre, the tensioner activated and will then tension itself as you drive. What could be simpler?