Identifying a usage factor is complex. With this device no more hesitation possible: it is the safest factor.
REGULATION (EU) 2016/425
EN363 : 2008 Personal fall protection equipment - Personal fall protection systems
EN364 : 1992 Personal protective equipment against falls from a height : Test method
EN365 : 2004 Personal protective equipment against falls from a height – General requirements for the instructions for use, maintenance, periodic examination, repair, marking and packaging.
EN355 : 2002 Personal fall protection equipment - Energy absorbers.