Lustrous silver-white. Known for superior toughness and heat resistance, delivering a lifetime of dependable use.
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Orders over $79
CNC Machined
Solid metal billets
Serialized Seal
Official hologram
Lifetime Warranty
Built to last
Cobalt is the exotic superalloy base metal they put inside jet engine turbine blades and nuclear reaction vessels because it refuses to deform under extreme heat and pressure. At 35 grams, this die is exceptionally dense, impossibly tough, and gleams with a slick, lustrous silver-white finish built for a lifetime of dependable, heavy-duty rolling.
Cobalt is so resistant to wear that it rapidly dulls standard CNC tooling. It must be machined with specialized carbide cutters to achieve sharp, perfectly balanced geometric faces.
It is the ultimate flex for engineering and metal enthusiasts—a heavy, indestructible superalloy that feels like it belongs in an aerospace lab.
If you are in-between those sizes,
we recommend ordering the upper limit.
| US/Canada | UK/Australia |
|---|---|
| 5 | J |
| 6 | L |
| 7 | N |
| 8 | P |
| 9 | R |
| 10 | T |
| 11 | V |
| 12 | Y |
| 13 | Z |
| Ring Size | Inner Diameter |
|---|---|
| US 5 | 15.7 mm |
| US 6 | 16.5 mm |
| US 7 | 17.3 mm |
| US 8 | 18.1 mm |
| US 9 | 18.9 mm |
| US 10 | 19.8 mm |
| US 11 | 20.4 mm |
| US 12 | 21.5 mm |
| US 13 | 22.2 mm |
step 1. Cut a strip of paper
step 2. Wrap it around the finger
step 3. Mark the spot, where paper meets 
step 4. Measure with the ruler (mm)| Ring Size | Measurement |
|---|---|
| US 5 | 49.2 mm |
| US 6 | 51.8 mm |
| US 7 | 54.5 mm |
| US 8 | 57.0 mm |
| US 9 | 59.2 mm |
| US 10 | 62.3 mm |
| US 11 | 64.2 mm |
| US 12 | 67.5 mm |
| US 13 | 70.1 mm |
Our Customer Support team can help
with any other questions you have.
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