The progression gate that cannot be bought with scrap
Scrap will not buy you a Workbench Level 2. Neither will a full tech tree, and neither will a Research Table.
Since the Meta Shift update on 2 October 2025, the higher workbenches are gated behind Blueprint Fragments, and the only way to get them is to go out onto the map and do monuments.
That is deliberate. The fragment gate exists to stop players teching to endgame gear while hiding in a bush.
If you are stuck at Workbench 2, the fix is not more scrap — it is a monument run.
What they cost
| Workbench | Fragments | Plus |
|---|---|---|
| Level 2 | 5 Basic | 500 metal fragments + 20 HQM |
| Level 3 | 5 Advanced | 1,000 metal fragments + 100 HQM |
20 Basic fragments combine into 1 Advanced. Right-click the stack in your inventory and choose Combine.
That means 100 Basic fragments is enough, on its own, to build a Level 3 Workbench — which is the fallback that makes solo progression possible.
One thing every old guide gets wrong
Basic and Advanced fragments do not combine into pages or books, and they are not Research Table inputs.
The “100 fragments → 1 page → 1 book → research” path you will read in older guides is the pre-October-2025 system and no longer exists.
Where Basic fragments come from
The guaranteed drops
These sit inside the keycard puzzle rooms, and this is the reliable source.
| Monument | Basic fragments |
|---|---|
| Underwater Labs | 4 |
| Power Plant | 3 |
| Train Yard | 3 |
| Water Treatment Plant | 3 |
| Airfield | 2 |
| Arctic Research Base | 2 |
| Supply Drop | 2 (100%) |
| Sewer Branch, Satellite Dish, Radtown, The Dome, Large Harbor, Small Harbor, Ferry Terminal | 1 each |
By puzzle tier: a green-card room gives 1, a blue-card room gives 2 — and a blue-card room is also where the red card sits.
The chance-based sources
| Source | Chance |
|---|---|
| Military Crate | 10% |
| Underwater Advanced Crate | 10% |
| Junkpile scientists | 10% |
| Metal detecting on roads and rails | 6.1% per hit |
| Recycling a T2 Workbench at a Radtown recycler | 3 fragments returned |
The metal-detecting number matters because you can collect it while already walking home from a monument. Keep a detector out on the road run and the 6.1% is free.
Where Advanced fragments come from
| Source | Amount | Chance |
|---|---|---|
| Locked / hackable crate | 2 | 100% |
| Launch Site | 2 | on the ground |
| Military Tunnels | 2 | on the ground |
| Nuclear Missile Silo | 2 | on the ground |
| Underwater Labs | 2 | on the ground |
| Elite Crate | 1 | 10% |
Every locked crate gives 2. Two crates and you have a Level 3 Workbench from fragments alone.
The elite-crate side income is a 1-in-10 gamble, but elite crates cluster at the places you are already looting — Military Tunnels, the rigs, the silo — so the odds add up across a good run.
The real decision: convert, or go take a crate
This is the choice that decides your wipe, and the obvious answer is usually the wrong one.
Converting looks terrible. 20 Basic for 1 Advanced is a brutal rate: 100 Basic fragments — twenty puzzle rooms — for one bench.
But the crates are where the clans are. A hackable crate sits on the Large Oil Rig or the Cargo Ship, announces itself to the entire server the moment you touch it, and then locks you in place for 15 minutes so anyone can come and take it.
So the honest breakdown:
| Path | Rate | Actual risk |
|---|---|---|
| Locked crates | 2 Advanced per crate, ~30 min each | Contested by clans; you may lose the crate at 0:00 |
| Elite crates | 1 in 10 | Free, but slow and RNG |
| 20:1 conversion | 100 Basic per bench | Slow, but entirely under your control |
For a solo on a busy server, the conversion is usually faster in practice, because you can run green and blue puzzles indefinitely without fighting anyone, and every one of those runs also pays scrap, components and cards.
When to convert, specifically
Do not sit on a stack waiting to get lucky. If you are holding 80 Basic and need 4 Advanced, convert immediately — 80 ÷ 20 = 4 — and build the bench today rather than tomorrow.
Farming Basic fragments you already have a route for beats gambling on a rig you cannot hold.
The fastest route, end to end
- Get a green keycard — from a barrel or a low-tier monument.
- Run a green puzzle (Sewer Branch, Satellite Dish, a Harbor). Take the 1 Basic fragment and the blue card from the loot room.
- Take the blue card to Train Yard or Water Treatment Plant. Each gives 3 Basic fragments.
- Craft the Level 2 Workbench with your 5.
- For Level 3: hack locked crates for 2 Advanced each — or convert 20 Basic at a time.
Underwater Labs is the best single Basic source at ~4 fragments per dive, plus elite crates and the standard loot. It is worth investing in scuba gear and an oxygen tank.
Four ways players waste them
- Recycling them. Recycling a fragment returns nothing. Sort before every recycler run.
- Carrying too many at once. Fragment runners are specifically hunted. Bank them often.
- Farming roads instead of monuments. Roads give scrap. Monuments give progress.
- Grinding Advanced with primitive gear. The Advanced sources are the hardest loot in the game; do not turn up to a rig with a bow and a plan.
Related guides
- How to Open a Locked Crate in Rust — the 2-guaranteed-Advanced source
- Rust Tech Tree Guide — what to spend the fragments on
- How to Use the Metal Detector in Rust — the 6.1% road source
- Rust Monuments Guide — every puzzle monument
- Rust Monument Loot Tables — elite crate odds
- Rust Crafting Guide — workbenches and research
- Rust Military Tunnels Guide — 2 Advanced on the ground
- Rust Oil Rig Guide — the crate, and the fight for it