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SARKEN Front Sections, SARKEN crampon front sections, adaptable to most Petzl crampons - Petzl USA
Petzl Sarken Crampon | Tech Spec Review - YouTube
Amazon.com : PETZL Irvis Hybrid Crampons with Steel Front Section and Aluminium Heel Universal Leverlock System, for Ski Touring and Glacier Travel, One Size : Sports & Outdoors