Petzl Charlet Vasak Spirlock Crampon Crampons for traditional mountaineering. Features: Walking on 10 points: length of points designed for optimal stability and avoidance of the "stilt" effect, lateral points are separated to respect the asymmetry of the boot and to limit the "rail" effect which increases the risk of slipping, supplied with ANTISNOW to avoid slipping on sticky snow. Front pointing: 2 flat front points for increased bearing power, thin-section points for good penetration on ice, next 2 points inclined to give stability. Lightweight: less than 900 g whichever binding is chosen. Adjustment is easy (no tools) and precise (to the half-size). for boots with a rear sole overlap (wire at the rear, flexible binding at the front). Strap fastening system, avoiding the encumbrance of a heel-bail. Technical specifications : Sizes : 36 to 46 (M bar, fitted as standard) and 41 to 50 (L bar, optional). Weight : 2 x 412 g + ANTISNOW (56 g) = 880 g