Ten upgrades that change how a bench crafts. None can be crafted or researched; nine drop from crates.
Every bench a player places takes 10 upgrades, including the tier 1 bench and the Engineering Workbench.
| Bench | Health | With Reinforced |
|---|---|---|
| Workbench Level 1 | 500 | 1,000 |
| Workbench Level 2 | 500 | 1,000 |
| Workbench Level 3 | 750 | 1,500 |
| Engineering Workbench | 500 | 1,000 |
Crafting speed increases by 25% for each item already completed in the same batch.
Whether 0.25 caps the total bonus at 25% or floors craft time at a quarter, which is four times faster. The two readings differ by a factor of sixteen.
Locked Crate 6.25%, Elite Crate 3.75%
Provides a 100% comfort zone around the workbench for those long crafting sessions.
What a comfort level of 1.0 does to healing and stress, which is a system this wiki has not extracted.
Normal Crate 0.63%
Armor or clothing compatible with insert slots will roll an additional slot when crafted using this upgrade.
Which crafted items receive the extra slot, and whether it applies at craft time only. It is an armour insert slot on the crafted item, not an eleventh bench slot.
Normal Crate 0.63%
10% chance to produce a free bonus item when crafting in batches. Ineffective when crafting explosive and raid related items.
What a hit on the 10% actually produces: a duplicate output, refunded ingredients, or something else.
Military Crate 1.67%, Underwater Lab Military Crate 1.67%
Allows unlocking any tech tree item regardless of progression. Cost is doubled and there is a 25% chance of failure that still consumes resources.
What a success yields, beyond costing twice as much and failing a quarter of the time.
Military Crate 1.67%, Underwater Lab Military Crate 1.67%
Doubles the workbench crafting radius, letting you craft from twice as far away.
Whether doubling the range scales all three axes of the bench's craft area or only the horizontal ones.
Normal Crate 0.63%
Crafting at a workbench with this upgrade has a chance to refund up to 10% of the ingredient costs back to you in raw material form.
What the 10% is a fraction of: the recipe cost, the item's recycle value, or the stack.
Normal Crate 0.63%
Increases the workbench's max HP by 150% and grants explosive damage resistance.
In-game text says 150%; measured values double bench health.
Military Crate 1.67%, Underwater Lab Military Crate 1.67%
Reduces the scrap cost of all tech tree unlocks at this bench by 20%.
The absolute Scrap prices the 20% applies to. This wiki does not publish tech tree prices, because a node can request a runtime fallback.
Locked Crate 6.25%, Elite Crate 3.75%
20% chance to produce a random surplus part (1-8) when crafting. Surplus parts are used in special alternate recipes.
No reachable source in this build
It doubles every bench's max health and cuts explosive damage by 20%, applied after the bench's own protection. It raises the maximum without healing: a bench at 300 health stays at 300.
The in-game text says 150%. The shipped values give 100%, so the description and the numbers disagree; we publish the numbers.
11 items are excluded from the Efficiency upgrade in the game files. Raiding materials, mostly. The seeker rocket is not on the list.
The item exists and its loot assets ship, but nothing references them, so no container can drop it. Its component also carries no effect values at all. Several wikis list it as a Locked Crate or Elite Crate drop; in these game files it is neither.
These are values the game ships without shipping their meaning, so we print the number and the field it came from rather than inventing an explanation. Nothing below is a guess we are hiding.
Whether 0.25 caps the total bonus at 25% or floors craft time at a quarter, which is four times faster. The two readings differ by a factor of sixteen.
Field: maxSpeedMultiplier
To settle it: Time a five item batch in game, or read the clamp in the shipped assembly.
What a comfort level of 1.0 does to healing and stress, which is a system this wiki has not extracted.
Field: comfortLevel
To settle it: Extract Rust's comfort system as its own dataset.
Which crafted items receive the extra slot, and whether it applies at craft time only. It is an armour insert slot on the crafted item, not an eleventh bench slot.
Field: bonusSlots
To settle it: Read the ItemModContainerArmorSlot callers in the shipped assembly.
What a hit on the 10% actually produces: a duplicate output, refunded ingredients, or something else.
Field: bonusChance
To settle it: Read ItemModWorkbenchEfficiency in the shipped assembly, or craft a large batch and count.
What a success yields, beyond costing twice as much and failing a quarter of the time.
Field: costMultiplier, failChance
To settle it: Read ItemModWorkbenchPrototype in the shipped assembly.
Whether doubling the range scales all three axes of the bench's craft area or only the horizontal ones.
Field: rangeMultiplier
To settle it: Read the workbench trigger consumer in the shipped assembly.
What the 10% is a fraction of: the recipe cost, the item's recycle value, or the stack.
Field: maxRefundFraction
To settle it: Read the recycle bin refund path in the shipped assembly.
The absolute Scrap prices the 20% applies to. This wiki does not publish tech tree prices, because a node can request a runtime fallback.
Field: costReduction
To settle it: Out of scope by site policy, not a data hole.
What this upgrade does. Its component serialises no effect values at all, so the item description is the only shipped source.
Field: none
To settle it: Read ItemModWorkbenchSurplus in the shipped assembly. An empty class body is itself the answer.
Modded servers can switch the upgrade panel off with useLegacyWorkbenchInteraction.
Client data: build 25129251, captured 6 Sept 2026. Sources and dates.
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