Simple, as its name implies, is an easy-to-use caving descender. It can be used with 8.5 to 11 mm diameter low stretch kernmantle ropes. Reduced bulk and low weight simplify progression in narrow passages. The pulleys can be rotated or replaced to prolong the duration of use over time. Elongated connection hole allows the FREINO Z carabiner to be rotated to help prevent dropping the descender when transferred from gear loop to attachment point. Safety gate on the openable side plate allows the rope to be installed easily while the device remains connected to the harness, making it easier to pass intermediate anchors.  Very easy to use; the rate of descent is controlled by varying the grip on the free end of the rope Installation diagram engraved on the descender Compatible with 8.5 to 11 mm diameter low stretch kernmantle ropes Clean design limits risk of snagging in narrow passages Includes two aluminum pulleys for reduced weight Weight 240 g Materials Aluminium