Blast Zones are placed at strategic places around the frame: 12 o'clock, 10 & 2, and 3 & 9 o'clock. Whether you're looking to add pure power, increase your racquets sweetspot, or increase stability, the safe and non-toxic silicone based Blast Zone weights make it easy to tune your racquet to your specific needs. These Blast Strips are pre-cut and measured for either 2 or 3 grams per strip making customizing the weight and balance of your racquet much easier than if you were using lead tape or tungsten.