Chest rope clamp specifically conceived for climbing,caving,rescue,work on height,canyoning. All the components are part of the latest generation of Kong blockers. Excellent ability to block out particularly on muddy and icy ropes thanks to the holes on the cam. The new material and a special chemical and thermal process give to the cam,in addition to black color,a much higher surface hardness. The result is a great wear resistance and a reduction of the fragility that usually penalizes steels by quenching to low temperatures. New opening lever,ergonomic,easy to handle and protected from shocks and from the risk of accidental opening. Fitted with anti-overturning system of the cam.