The new Grivel 360° screw can benefit all ice climbers. In situations where safety depends on speedy screw placement (crevasse rescue or steep ice) the 360’s sharp bite and easy starting are quite reassuring. The new 360 screw is now the fastest ice screw to place because they added sharper and longer teeth. When obstructions of rock or ice prevent a normal fixed hanger’s rotation, the 360’s handle may be lifted away from the surface and turned freely. The 360’s super-slick finish makes it very difficult for ice to clog its core. The 360’s efficiency makes it possible to place an ice screw where and when you want to.
Grivel Reverse Thread
The UIAA normally tests ice screws using a straight pull from a specific mix of concrete to test things like hanger strength. During these pull tests, Grivel’s reversed threads grabbed more concrete than the more standard thread design. Presumably, this larger chunk of concrete would be akin to a larger area of ice, suggesting that the screw was more effective at spreading the load.