Callaway Big Bertha Irons

The Big Bertha 2008 Irons take forgiveness to new heights by integrating a set of clubs featuring the new i-brids™, clubs designed to replace hard-to-hit long irons. The i-brids combine the accuracy & control of irons with the forgiveness & versatility of a hybrid & are the most highly playable hybrid-like irons Callaway Golf could make.
In the women's model the 4 through 7 iron is always going to be the i-brid version while the 8 thru lob wedge will be the traditional.
On the men's model the 3 through 5 iron comes in both i-brid and traditional.

Features of the design:
I-Birds

The 3i, 4i and 5i in the set are i-bird clubs, blending the control and accuracy of irons with the forgiveness, distance and versatility of hybrids. The low, deep center of gravity (CG) helps get the ball in the air quickly and easily, and the extremely wide sole helps improve turf interaction.

Super Game-Improvement mid and short irons

Designed for the ultimate in forgiveness with increased offset, a large effective hitting area and a constant width sole that helps improve turf interaction.

Fully integrated set design

Seamless performance progression throughout the set provides consistent distance separation with optimal trajectories.

Callaway Golf Core Technologies

Extreme Notch Weighting for a higher MOI and more stability. VFT Technology for more distance and forgiveness; S2H2 increases discretionary weight by positioning it in the perimeter of the clubhead; 360-Degree Undercut Channel maximises perimeter weighting by moving the CG lower and farther back.

Modified Tru-Bore

An advanced version of the original Tru-Bore design, the polycarbonate tip plug at the end of the shaft dampens vibration for enhanced feel and performance.