On Sale. Grivel Cascade Ice Tool Component Fall 2009 The Cascade by Grivel is a hot-forged, high performance pick designed for technical ice and mixed climbing. The thin tip and small profile allow it to penetrate ice with very little driving energy behind the head of the tool a must for climbing fragile ice features. The elasticity of the Cascade increases resilience and prevents it from in.poppingin. when cammed in thin cracks. The pick angle matches the curve of Tech Wing, Top Wing, Taa-K-Oon, Racing Wing or any of the older Machine series tools.