diablo
Custom Engineering Custom Engineering
Passive
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.

In-game

For Caltrops, both the active and inactive duration is doubled.

Demon Hunter Skills

Primary Skills
Hungering ArrowEntangling ShotBolasEvasive FireGrenade
Secondary Skills
ImpaleRapid FireChakramElemental Arrow
Defensive Skills
CaltropsSmoke ScreenShadow Power
Hunting
VaultPreparationCompanionMarked for Death
Devices
Fan of KnivesSpike TrapSentryVengeance
Archery
StrafeMultishotCluster ArrowRain of Vengeance
Passive Skills
Thrill of the HuntTactical AdvantageBlood VengeanceSteady AimCull the WeakNight Stalker
BroodingHot PursuitArcheryNumbing TrapsPerfectionistCustom Engineering
GrenadierSharpshooterBallisticsLeechAmbushAwarenessSingle Out