Ice Screw Sharpening removes about 1.5mm** from a dull screw. That's 6x sharpening, which would bring a 16cm down to 15cm. That's a lot of climbing.
The CNC machining process is cooled so NO HEAT is generated that could damage the heat treatment of the screw.
These ice screws come out sharper than new. I can apply this aggressive tooth profile to any generation of Black Diamond Express or BD Turbo ice screw. Saving you money in not having to buy new screws. Petzl, Grivel, DMM and Omega Pacific ice screws can be sharpened to an aggressive tooth profile as well. Including the new Aluminum Petzls.
All sizes 10cm - 22cm