diff --git a/data/tetra/materials/metal/cobalt.json b/data/tetra/materials/metal/cobalt.json
index c8f9c9b..c67f1bc 100644
--- a/data/tetra/materials/metal/cobalt.json
+++ b/data/tetra/materials/metal/cobalt.json
@@ -4,9 +4,9 @@
   "primary": 4,
   "secondary": 5,
   "tertiary": 7,
-  "durability": 1260,
+  "durability": 650,
   "integrityCost": 2,
-  "integrityGain": 2,
+  "integrityGain": 5,
   "magicCapacity": 85,
   "toolLevel": 5,
   "toolEfficiency": 7.3,
diff --git a/data/tetra/materials/metal/copper.json b/data/tetra/materials/metal/copper.json
index 6fa86fd..d8f6b1a 100644
--- a/data/tetra/materials/metal/copper.json
+++ b/data/tetra/materials/metal/copper.json
@@ -9,7 +9,7 @@
     "integrityCost": 1,
     "integrityGain": 5,
     "magicCapacity": 78,
-    "toolLevel": "minecraft:stone",
+    "toolLevel": 2,
     "toolEfficiency": 5,
     "tints": {
         "glyph": "copper_glyph",
diff --git a/data/tetra/materials/metal/manyullyn.json b/data/tetra/materials/metal/manyullyn.json
index 8db4a61..816d54b 100644
--- a/data/tetra/materials/metal/manyullyn.json
+++ b/data/tetra/materials/metal/manyullyn.json
@@ -4,7 +4,7 @@
     "primary": 9,
     "secondary": 7.8,
     "tertiary": 4.5,
-    "durability": 1250,
+    "durability": 1070,
     "integrityCost": 3,
     "integrityGain": 5,
     "magicCapacity": 90,
diff --git a/data/tetra/materials/metal/queens_slime.json b/data/tetra/materials/metal/queens_slime.json
index d289377..b9080c6 100644
--- a/data/tetra/materials/metal/queens_slime.json
+++ b/data/tetra/materials/metal/queens_slime.json
@@ -4,7 +4,7 @@
     "primary": 3.3,
     "secondary": 4.9,
     "tertiary": 8,
-    "durability": 1650,
+    "durability": 950,
     "integrityCost": 2,
     "integrityGain": 5,
     "magicCapacity": 105,
diff --git a/data/tetra/materials/metal/rose_gold.json b/data/tetra/materials/metal/rose_gold.json
index beadba3..824d697 100644
--- a/data/tetra/materials/metal/rose_gold.json
+++ b/data/tetra/materials/metal/rose_gold.json
@@ -4,10 +4,10 @@
     "primary": 5,
     "secondary": 4.4,
     "tertiary": 3,
-    "durability": 105,
+    "durability": 1200,
     "integrityCost": 2,
     "integrityGain": 3.5,
-    "magicCapacity": 922,
+    "magicCapacity": 200,
     "toolLevel": 4,
     "toolEfficiency": 13.3,
     "tints": {
diff --git a/data/tetra/materials/metal/steel.json b/data/tetra/materials/metal/steel.json
index 68b8c04..eb35ac5 100644
--- a/data/tetra/materials/metal/steel.json
+++ b/data/tetra/materials/metal/steel.json
@@ -4,7 +4,7 @@
     "primary": 6.5,
     "secondary": 4.4,
     "tertiary": 3.5,
-    "durability": 1350,
+    "durability": 850,
     "integrityCost": 2,
     "integrityGain": 3,
     "magicCapacity": 90,