Eventually I became aware of this product, which convinced me mainly because of the relatively high maximum extension length. Kevlar is also more flexible and lighter than a steel cable.
I must say that I am delighted with the KEY-BAK! It makes a very robust impression, is not even very difficult, can be easily and quickly fastened with snap hook everywhere, and I have my knife finally literally on man, it can also be used without restrictions, and yet it is permanently attached, and so before secured loss. While it is at just 170 grams too heavy to be lifted by the mechanism can be return, but he is strong enough that the knife does not completely make towards the ground from the dust, if it hangs outdoors times. The rope is then pulled out, although about 10 cm, but it remains the case. And the knife is anyway usually always in the belt bag, on which the key is attached.
So you see, this key role is not only suitable for keys, but you can fix it all sorts of things that do not want to lose you, but their function is limited by a too short cable or cumbersome loosening a fastener.