Black Diamond nForce Ascenders are said to have a stronger clamping force than conventional ascenders thus providing a better grip even on muddy or icy ropes.
What gives the nForce this slip-free clasp is its four-bar linkage system that directs body weight into the rope. This results in nearly 30 percent greater clamping force than ordinary ascending tools giving you more confidence as you climb.
The stainless steel cams that press on the ropes are spring-loaded and can be operated during ascent by pushing your thumb on a lever. They can also be opened wide for easy rope insertion. When inserting the ropes, a locking mechanism holds the cams open. This same mechanism also locks the cams in the closed position. Is operated via a cam trigger using your index finger.
The slots where the ropes rest are flared. This means that ropes ranging from a diameter of 8 – 13 mm can fit perfectly into the Black Diamond nForce. There are two 360° carabiner clip-in points, one at the top and another at the bottom. This allows full rotation of the carabiners.
The frame is made of anodized aluminum thus ensuring its strength, light weight, and corrosion resistance. The ergonomic grip is coated with polyethylene which provides a non-slip grip even with heavy gloves. The wide space in the grip improves manipulating the cam trigger.
Black Diamond nForce ascenders are color-coded –blue for the right hand and gold for the left.