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On Sale. Free Shipping. Grivel Pan Pipe Screw Carrier The Pan Pipe by Grivel is made from the same soft rubber as Espresso but holds five ice screws. It may be slung over the shoulder or worn around the waist to provide speedy access to screws without fumbling around, even while wearing thick gloves. Some climbers don't like the way it looks but the Pan Pipe works and it's the best solution for racking multiple 360s.