Product Overview: This Competition Spec Hot Launch C523 Driver features a more traditional design and setup that delivers maximum ball speed for medium to fast swing speeds. The Hot Launch C range is for the player seeking optimal launch and spin rates, while still enjoying the benefits of extreme ease of use, forgiveness, and accuracy. Features: New Sole Rail Design – The C523 driver features a new sole rail design that extends from leading edge to trailing edge. The new sole rail produces a super-low CG for high-launching shots with optimized spin rates and maximum ball speed off the face. MOI-Boosting Rear Sole Weight – A back weight is strategically placed to the extreme rear of the clubhead that places more mass at the trailing edge of the clubhead. The back weight creates an extremely high MOI rating, an 8% increase over the previous iteration, and surpassing 5,000 grams per cubic centimeter squared for top in-line stability. This weighting dramatically affects a lower and deeper CG positioning of the club for ease of launch and more forgiveness off the face at impact. Diamond Face VFT – Diamond Face Variable Face Thickness technology is a breakthrough in face technology that features 39 different thick and thin diamond shapes or “mini-trampolines” behind the face. Diamond Face VFT produces a hotter face with faster ball speeds and better performance on off-center hits, as well as reduced spin. Larger Power Channel – The Power Channel on the sole of the club behind the club face is strategically deeper and wider in the C523 design. The 85% larger Power Channel featured on the C523 Driver distributes weight to promote increased face flexing, amplified ball speed and less spin, as well as added forgiveness on shots struck lower on the face. 360° Cup Face Design – The premium 6-4 Titanium head features a deep 360° Cup Face design. Cup Face construction increases the amount of face flexing on off-center hits to achieve higher ball speeds and creates a more solid feel. Ultra-Light Premium Shafts – The C523 Driver comes stock with an ultra-light UST Mamiya HL-SST graphite shaft that ranges from 45 to 60 grams depending on the flex. The UST Mamiya HL-SST shafts feature Stabilized Shaft Tech, a softer tip, and a mid-range flex. Stabilized Shaft Tech is an added cross weave that reduces ovaling for better stability during the loading and unloading of the shaft.