The Callaway Big Bertha B21 Iron combines a set spanning 4-iron through 9-iron, a standard length of 38.5 in, and a listed swing weight of D0 (steel) / D1 (graphite).
Callaway Golf Club Specifications
Iron • 2020 • RH/LH
Set makeup: 4-iron through 9-ironLength: 38.5 inSwing weight: D0 (steel) / D1 (graphite)
Key specifications
IronClub type
4-iron through 9-ironSet makeup
62°-64° for 4-iron through 9-ironLie angle
38.5 inStandard length
D0 (steel) / D1 (graphite)Swing weight
Visual model specs
Built only from this model’s supplied specifications.
Iron set makeup
The supplied set spans 4-iron through 9-iron.
4IRON5IRON6IRON7IRON8IRON9IRON
Club information
| Manufacturer | Callaway |
|---|---|
| Model | Big Bertha B21 |
| Club type | Iron |
| Release year | 2020 |
Head, loft and weighting
| Set makeup | 4-iron through 9-iron |
|---|---|
| Lie angle | 62°-64° for 4-iron through 9-iron |
| Swing weight | D0 (steel) / D1 (graphite) |
Shaft, grip and setup
| Standard length | 38.5 in |
|---|---|
| Stock shaft options | True Temper Elevate 85 steel; Callaway/UST Recoil graphite |
| Stock grip | Callaway Universal grip |
| Hand availability | RH/LH |
Construction and forgiveness
| Face / material / construction | High-strength steel face with Callaway Flash Face Cup construction; hollow-body design with urethane microspheres |
|---|---|
| MOI / forgiveness information | High-MOI, oversized game-improvement iron designed for increased stability, launch, and forgiveness |
Data note: Golf club specifications can vary by loft, shaft, flex, hand, set composition and market. Where the source row lists multiple configurations, the complete supplied value is retained in the tables. Representative benchmark charts normalize multi-club sets to a consistent comparison point.