The Petzl Sum'tec is a true hybrid ice axe of a traditional ice axe and an ice tool. The Sum'tec features a modular (read interchangeable and replaceable) durable hot-forged pick with a fixed adze and a bent shaft for added clearance. One of our testers favorite features is a sliding pommel which Petzl calls a Trigrest that provides support for our hand and increased the accuracy of our swing. As a result, the Sum'Tec climbs ice better than any other axe in this review and is easily compared with basic (less dramatically curved) alpine ice tools. You can carry two of them easily too climb more difficult water or alpine ice. It is durable and the only drawback is the fact it is on the heavier side for ice axes (but lighter than other modular tools). The slider pommel is cool; it turned nearly everyone's head.
This is one of the heavier ice axes we tested and a little overkill for many moderate routes. But if you climb a lot of steeper terrain, this ice axe is tough to beat. Along with the Petzl Summit and the Grivel Evolution, it is the best step chopping and platform digging axe we tested. Compared to the Black Diamond Venom, it was more expensive but lighter and easier to climb leashless.