The Acer XV Thriver Mini is a special shallow faced control club off a short tee as well as a club to use in the fairway when you need the maximum distance to reach a par 5 or long par 4. This all-titanium clubhead has a very large footprint at address making this much more forgiving than a typical #3 wood. If it were the height of a modern driver, then the volume would comparable to a 380 cc driver telling you just how forgiving it is. Plus being all-titanium, there are two performance advantages. As titanium is very light, a very high concentration of weight was placed on the sole for more height than the loft would indicate. Finally, we chose titanium for the thin, active face to give you more distance. The Thriver Mini also features the same Power Chamber and Gravity Port as the matching driver for improved performance and versatility. Stock screw is 7 grams and requires 4mm Allen wrench.