The Petzl Sarken is the crampon for anybody headed out into variable, mixed terrain. The 4x4 of crampons. The T shaped front points are designed for excellent penetration in hard ice and stable front pointing on mixed terrain while providing solid purchase in snow and neve. Features: New updated heat treatment process to increase the strength and durability New structural re-enforcements on both sides of the crampon further increase the durability Length of points is designed for maximum stability Sharp points for great purchase in ice Two toothed front points for excellent placements and optimum purchase in soft ice Two points angled forward to reinforce purchase and give support when front-pointing Third row of points to optimize bite on hard snow slopes Four teeth for stability while descending face downhill Lateral points for purchase while traversing Linking bar can be set for flexible or semi-rigid modes to adapt the crampon to flexible or rigid boots SARKEN V2 stamped on crampon frame for quick identification Specs: Fits boots sizes 36 to 46 with M linking bar (included) Optional L linking bar fits boots sizes 41 to 50 (T20850