Openable rope grab, the Blockmax has 2 functions:

• automatic
• and manual (for work on inclined surfaces to restrain movement) Delivered with a Standard karabiner. Also exists with or without dissipator,2 versions: a)Works on horizontal,inclined or vertical surfaces,  b)Can be easily mounted with only one hand,Openable : to allow the mounting at any point of the rope, follow the rope without manual intervation,has triple safety- 3 movements are required to open it.