A very easy and fast steel screw to place on lead. Razor sharp teeth and a T-bar handle makes placement a doddle as you can turn it and keep the pressure on more easily than with any other screw. Fairly easy to rack with a karabiner, even several at a time, though the handle does stick out a bit.
Grivel Ice Screws have the threads angled the opposite way to most other screws - Grivel claim this makes them stronger on ice pull tests.
Personally tested by Needle Sports staff at Rjukan and highly recommended!
NB Colour of the handle may vary as there has been an in line colour change on some lengths.