Players looking to add power to their game will find just what they're seeking in the Boris Becker Delta Core Power. This 110 sq. in. headsize racquet offers a generous sweetspot and maintains solid stability for a lightweight racquet thanks to the Double Rail Technology at 3 and 9 o'clock in the hoop. DRT allows strings to move freely to add comfort and strengthens the frame to resist twisting on off-center shots. Our TW testers found the Delta Core Power to be arm-friendly, offering a dampened feel on all shots. Power was easily tapped off of slower swing speeds, and the Delta Core Power offered the stability of a heavier racquet despite its low strung weight of 10.3 ounces. Overall, the Delta Core Power is a must demo for players who are looking for the extreme comfort and a healthy of dose of free power.