The Petzl Micro Traxion is an ultra-light, ultra-compact progress capture pulley that is exceptionally efficient. Pulley with integrated progress capture device can be used as a self-jamming pulley or simple pulley. Upper button allows cam to be locked in open position. Aluminum sheave mounted on sealed ball bearings for excellent efficiency. Rope clamp works on muddy or frozen ropes. Ultra-compact and lightweight. Weight: 85 g. Sheave type: sealed ball bearings 3342540091986 20079300012 P53