First the good news: as expected, the crampons can be perfectly adjusted to ski boots and mountain boots.
Changing the front bracket is almost impossible without a vice.
Unfortunately, the metal tab at the front with the ring where the safety strap is pulled in so that the irons do not get lost in the event of a fall is missing.
It seems that the previous model was delivered in 2016, although the photo shows the new model.

Peter (04/02/2019), Austria
Orders: 18
Reviews: 10

Today I experienced a really good feeling in my feet on extremely hard and brittle ice. I'm thrilled! The pronounced front spikes penetrate easily and hold sensationally. If I had had an ice pick (instead of mixed) on the Viper, it would have been a completely successful climb ;-)

Jens (24/02/2018), Germany
Orders: 24
Reviews: 14

The best I have seen so far!

Liudmila (12/08/2016), Austria