Keeping your screws sharp and your other kit protected is of key importance whilst ice climbing, which is where the Octo comes in. Its unique feature is that the screws don?€?t fall out, courtesy of a plastic retainer. The Multihook is Petzl?€?s first Abalokov threader, with a retractable hook and place, which can also be used to clear out ice from within ice screw tubes.