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ISC D4 descender

The D4 descender by ISC is suitable for both work and rescue and features an innovative cam action, offering precise control at slow or fast speeds.The handle mechanism is designed to rotate through 360º accompanied by audible clicks which help the user identify the correct position of the handle. 

The handle itself is made from aluminium and is coated in a specially chosen paint which provides extra grip. 

Click here for a demonstration of the ISC D4 descender. 


  • solid stainless steel
  • double safety locking mechanism
  • 240 kg working load (two persons)
  • weight 655 g
  • fit for ropes of 10.5 - 11.5 mm


  • EN12841, NFPA, ANSI

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