|| Custom Engineering|
The duration of your Caltrops, Marked for Death, Spike Trap and Sentry is increased by 100%.
Increases the maximum number of active Sentries to 3, and increases maximum number of Spike Traps to 5. Also allows Sentry skill to hold 1 additional charge.
The self-loading mechanisms built into most hand crossbows and traps are delicate and difficult to maintain. Extensive practice is required to use them properly.
Custom Engineering is a Demon Hunter passive skill, unlocked at level 40.
For Caltrops, both the active and inactive duration is doubled.
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