Callaway Big Bertha Fusion Irons Specifications
Full factory loft, lie and length chart for the Callaway Big Bertha Fusion irons, 2004–2006.
- Years produced
- 2004–2006
- Category
- Game Improvement Irons
- Construction
- multi-material (titanium face cup, tungsten-loaded polymer core)
- Material
- titanium / tungsten / polymer
- Set makeup
- 2–LW
Data confidence: medium. These figures are compiled from secondary sources rather than a manufacturer spec sheet. If you have an original catalogue page, send it over and we will update the chart.
Loft, lie & length chart
| Club | Loft (°) | Lie (°) | Length (in) | Swing wt |
|---|---|---|---|---|
| 2 | 18 | 59.2 | 39.5 | D2 |
| 3 | 21 | 59.9 | 39 | D2 |
| 4 | 23.5 | 60.6 | 38.5 | D2 |
| 5 | 26 | 61.3 | 38 | D2 |
| 6 | 29 | 62 | 37.5 | D2 |
| 7 | 33 | 62.5 | 37 | D2 |
| 8 | 37 | 63.5 | 36.5 | D2 |
| 9 | 41 | 64.5 | 36 | D2 |
| PW | 46 | 65 | 35.75 | D3 |
| AW | 51 | 65 | 35.5 | D4 |
| SW | 56 | 65 | 35.25 | D4 |
| LW | 60 | 65 | 35 | D4 |
Lofts and lies are the factory standard build. Individual clubs may differ if they have been bent, re-shafted or re-gripped during their life.
About the Callaway Big Bertha Fusion
The Big Bertha Fusion irons of 2004 brought the multi-material Fusion Technology of Callaway's FT drivers into an iron, bonding a thin titanium face cup to a body with tungsten weighting and a polymer core to push weight to the extreme perimeter. They were marketed as some of the most forgiving irons Callaway had built and sat above the steel Big Bertha line in the range. Lofts are traditional with a 33 degree 7-iron and a 46 degree pitching wedge; the sources publish a single standard length ladder without labelling the shaft material.
Related models
- Successor: Callaway Fusion Wide Sole
- Predecessor in the premium multi-material line: Callaway Hawk Eye VFT
- Contemporary steel Big Bertha: Callaway Big Bertha (2006)
- Compare: Callaway Big Bertha Fusion vs Callaway Hawk Eye VFT
- Compare: Callaway Big Bertha Fusion vs Callaway Fusion Wide Sole
- Compare: Callaway Big Bertha Fusion vs Callaway Big Bertha (2006)
Frequently asked questions
What is the loft of a Callaway Big Bertha Fusion 7-iron?
The Big Bertha Fusion 7-iron has a loft of 33 degrees, with a 62.5 degree lie and a 37 inch standard length.
What made the Big Bertha Fusion irons different from other Callaway irons?
They used Fusion multi-material construction — a titanium face cup bonded to a body with tungsten weighting and a polymer core — instead of a one-piece cast stainless head, pushing far more weight to the perimeter.
What is the pitching wedge loft on the Big Bertha Fusion irons?
The Fusion pitching wedge is 46 degrees, followed by a 51 degree approach wedge, 56 degree sand wedge and 60 degree lob wedge.
Finding a used set
The Callaway Big Bertha Fusion ran from 2004 to 2006 and is no longer in production, so the used market is the only source. Search eBay, 2nd Swing, Golf Avenue and the PGA Tour Superstore trade-in listings, and check the loft and lie against the chart above before buying — sets this age have often been bent from standard.
- 2nd Swing Golf specification table for the Callaway Fusion iron set (2ndswing.com/golf-clubs/iron-sets/callaway-fusion-iron-set) — loft, lie, length and swing weight for the full 2-LW range
- qsponge.com / golfclubspec.com Callaway Fusion iron spec table — corroborates every loft, lie, length and swing weight figure
- LiveAbout, 'Looking Back at Callaway Golf's Original Big Bertha Fusion Irons' — confirms the late-2004 retail introduction and the multi-material Fusion construction
- Neither spec source labels the length ladder steel or graphite, and offset was not published, so confidence is held at medium and the offset column is omitted
Last reviewed 2026-07-29. Spot an error? [email protected]