The set contains a 1/4" socket adapter, a single slotted bit, and a nice selection of pozi, phillips, torx, security torx and hex plus bits (details below). It also has the Zyklop Mini Bit Ratchet and a small rapidaptor, and some 1/4" sockets.
You don't really get a sense for the size of the ratchet until you are holding it. I'd seen pictures, but was still surprised when I got it in the post. It's the length of my middle finger, or 87mm. Although it's very small, it's also very strong, and it is a 6 degree ratchet. It has a knurled ring on it to allow you to spin it with your thumb. You can insert bits straight into the ratchet, or you can use the rapidaptor if you want a bit more to hold onto. It also has a small switch on the side of the knurled ring to change the direction of the ratchet, as bits can only be inserted one way.
The bits and socket adapter are safely stored inside the case, which is opened by sliding the Wera badge up. Once opened, you will see two rows of bits, which separate for easy access. The sockets are easily twisted off the bottom of the case, and also have a knurled ring on them, so you can grip them with your fingers and thumb. There is also a belt hook on the back of the case.
When I originally bought this, I intended to use it as a tool kit for my bicycle. It's compact, has almost everything you need, and it's great quality. I was carrying it with my bahco reversible ratchet spanners, which I also love, and it had me covered for all my bike troubles. However, I decided that cycling was too much work, so now it's a part of my regular tool box ;-)
I don't actually use the bit ratchet that often, I mostly just use this as a stash of bits, which mostly gets used by my main combi drill, and often accidentally by my impact driver. To say I've used some of these bits with an impact driver, they did stand up really well.
I think this is a great kit. It's very compact, and very easy to use, if a little expensive. It's up to you to decide whether or not it's worth it, but I couldn't resist the temptation, and I don't regret buying it.
Tech spec rundown:
Zyklop Mini Bit Ratchet (6 degree ratchet), Small Rapidaptor, 1/4" x 50mm socket adaptor, SL 1.0 x 5.5mm, PH1 x 2, PH2 x 3, PH3, PZ1, PZ2 x 2, PZ3 x 3, H0P3 (Hex Plus), H0P4, H0P5, H0P6, H0P8, T10, T15, T20, T25, T30, T40, ST10, ST15, ST20, ST25, ST30. 1/4" Sockets: 5.5mm, 6mm, 7mm, 8mm, 10mm, 12mm, 13mm.
This review is also available on Amazon: https://www.amazon.co.uk/review/R6JSCNVVQU5ES/ref=cm_cr_rdp_perm