By default yes, it’s adjustable via ServerSettings.ini though
Here are the defaults:
- Simple Weapon Repair Kit: 20%
- Weapon Repair Kit: 15%
- Advanced Weapon Repair Kit: 10%
- Master Weapon Repair Kit: 5%
- Grandmaster Weapon Repair Kit: 2.5%
Relevant ServerSettings.ini entries:
ItemRepairDurabilityLossByRepairkitTier=(0.2,0.2,0.15,0.1,0.05,0.025)
ItemRepairDurabilityLossPenaltyChance=1.000000