Big Bertha - Callaway longest Total Performance Driver, faster speeds & Adjustable Perimeter Weighting for 20% higher MOI. Nothing short of groundbreaking – it’s lighter, hotter (of course), and more robust than ever. So we can increase ball speeds across the face in a Total Performance Driver. You probably hit it dead center every time. But even if you don’t, we have you covered. We’ve put our new continuous Adjustable Perimeter Weighting slide toward the rear of the club. That’s why Big Bertha has 20% higher MOI for more forgiveness AND a wider range of Draw and Fade bias options. It all amounts to longer, straighter shots. And those are good things. Very, very good things if you like outdriving your foursome. Here’s the quick 3-step process. Step 1: Increase or decrease loft in 1° increments (up to +2° or down -1°) to optimize launch angle and spin. Step 2: Adjust Draw or Neutral bias to optimize shot shape. Step 3: Hit absolute bombs off the tee, maximizing distance with more accuracy. Players really seem to like step 3. It’s a high strength, lightweight crown that improbably weighs only 8 grams. And here’s what we get by saving weight in the crown: Adjustable Perimeter Weighting, a deeper CG for more forgiveness, and low spin with a lighter, more preferred swing weight. Yep, you really get all that. That’s why when you add more adjustability to a driver, you’ve got to have Forged Composite. Big Bertha has a new lightweight, premium shaft offering from Mitsubishi, who makes some of the most trusted shafts on Tour. It’s called Fubuki Z, and it’s designed to increase energy transfer, resulting in more ball speed while delivering higher launch with low spin, with a smooth, consistent feel.