The Callaway Big Bertha OS Iron combines a set spanning 4-iron through 9-iron, a standard length of 38.875 in, and a listed swing weight of D1 (steel).
Callaway Golf Club Specifications
Iron • 2016 • RH/LH
Set makeup: 4-iron through 9-ironLength: 38.875 inSwing weight: D1 (steel)
Key specifications
IronClub type
4-iron through 9-ironSet makeup
61°Lie angle
38.875 inStandard length
D1 (steel)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 OS |
| Club type | Iron |
| Release year | 2016 |
Head, loft and weighting
| Set makeup | 4-iron through 9-iron |
|---|---|
| Lie angle | 61° |
| Swing weight | D1 (steel) |
Shaft, grip and setup
| Standard length | 38.875 in |
|---|---|
| Stock shaft options | True Temper Speed Step 80 steel; UST Recoil ES 460 graphite |
| Stock grip | Callaway Universal grip |
| Hand availability | RH/LH |
Construction and forgiveness
| Face / material / construction | Stainless-steel body with a face cup; 360 Face Cup technology and tungsten weighting |
|---|---|
| MOI / forgiveness information | Oversized game-improvement head with perimeter weighting, wide sole, and high MOI for enhanced 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.