The D4 descender has a 360° rotating handle that allows for very precise control of speed on descent. This rotation is accompanied by audible clicks that help the user position it correctly. It is made of aluminum and coated with a material that improves its grip for greater comfort.
The D4 is also equipped with two levels of safety. The first is the anti-panic function which stops the descent immediately when the user lowers the handle too suddenly. The second is the automatic stop when the user lets go of the handle.
In addition, the descender is locked by a metal button to make it impossible to open it unintentionally when ascending on a rope.
A durable descender for work at height and rescue
The D4 descender has its wear parts made of steel for better durability. The metal has been reinforced at the friction points to ensure a long life even under heavy use.
Its maximum working load is 240kg on ropes of 10.5 to 11.5mm diameter. These characteristics make it suitable for use in two-man rescue operations.
It can also move on an inclined or horizontal plane. Progression is made easier by simply manipulating the cam with your thumb.
Finally, the D4 descender can be used to control an rappel, to position oneself at a workstation or to make short ascents on the rope.