Here's what other sites are saying:
The Ortovox Pocket Spike turns your Pro Alu III Shovel into an ice axe capable of self-arresting down sketchy, icy terrain or helping you ascend surprisingly steep alpine tours. This small, compact kit includes a spike and a pick that you can attach to the Pro Alu III's shaft for a fully-featured ice axe. Both pick and spike are so compact they could fit in your ski pant's pocket, but it'd probably be best to tuck that inside your ski pack so you don't have two sharp items right next to your body as you drop the dangerous steeps you just ascended.
Ortovox Avalanche Safety Pocket Spike Safety Blue 2602000002. The POCKET SPIKE is used most of the time in the rucksack (or in the bag of the bag - hence the name) when it gets tough on the last meters to the summit or in an unpleasant crossing in the steep terrain. It can be attached to the handle of the PRO ALU III shovel with two handgrips providing additional protection. The POCKET SPIKE consists of two parts: The snappy forged wagon from AL 7075 T6 and the Stieldorn which is installed in place of the shovel blade. Both parts can be pushed together without sharp edges and weigh just 95 grams. Suitable for tours where you can look forward to some extra support on the last few meters.
Features of the Ortovox Pocket Spike Tough forged axe blade (AL 7075 T6) Effective aid in case of self arrest Anodized Fast assembly