The standard D4TM Work/Rescue Descender (RP880) has proven to be a popular Descender amongst Rope Access & Rescue users, all over the world.  Many users value the extra peace of mind of having a panic-brake function.
Feedback gathered from highly qualified and experienced 'Pro' users highlighted a demand for a device which does not incorporate a panic-brake function.  Enter the D4PRO!  The D4PRO Descender is the same great Work/Rescue Descender, but without the panic brake.