Wilson US Open GS 105 Adult Recreational Tennis Racket - Grip Size 2 - 4 1/4" Fused: Plated fiberglass and aluminum composition offers excellent blend of playability and control. Double Hole Technology: Larger grommet holes grant more string movement, generating extra power and creating greater ball pocketing for improved shock absorption. Great racket for players looking to increase confidence by hitting with more feel and control on shots Oversized Head: Enlarged sweetspot provides effortless power and extra forgiveness Length: Added length helps players stretch and reach one more ball Comes pre-strung Sleek racket hoop design inspired by US Open