The YONEX Duora Z Strike Badminton Racquet is an offensive Racquet specially made to boost power, speed, and control, giving players a tactical upper hand on the court. Massive Forehands, Quick Backhands! The YONEX Duora Z Strike Badminton Racquet uses cutting-edge technology to place two unique frame shapes into one revolutionary Badminton Racquet. The Racquet allows players to dominate the court with Powerful Forehands and Quick Backhands. YONEX Duora is suitable for players who use both Speed and Power in their game. Key Features: Dual Optimum System: In the dual optimum frame concept, YONEX has designed 2 types of frame sections into single frame constriction of YONEX Duora Z Strike Badminton Racquet. The front side of the frame is designed with a box section frame, while the backside of the frame is designed with an Aero frame. This type of configuration gives two sections into single frame construction. The Box section is designed with new material, Nanometric Dr, while the Aero section is designed with NI-TI fiber material. Both the Material together gives a new and revolutionary frame design, giving the following benefits to badminton players. The forehand side of the frame is designed with Box type section and equipped with Nanometric DR Material which gives a shuttle hold time of 3%. Due to this player places the shuttle with more power and superb control. The backhand side of the frame of the YONEX Duora Z Strike Badminton Racquet is designed with an aero-type section and equipped with NI-TI fiber, which gives repulsion of 9%. Due to this player gets a stiffer Racquet which results in quick Racquet repulsion. DUORA Grommet Design: The new DUORA Grommet design features 8 linked grommets made with differing thicknesses on either side of the frame. When hit on the box side, thicker and harder grommets on the aero side result in a stiffer string bed, ultimately increasing launch power on the shuttlecock. Extra Slim Shaft (Thinnest, Strongest Ever Produced by YONEX): Cutting-edge NANOMETRIC carbon technology is used to produce an ultra-thin, ultra-tough, aerodynamic shaft created for a stronger and more intense shot. About YONEX: YONEX is a manufacturer of badminton rackets and other sports equipment. The company has been in business since 1968 and is known for its superior quality and attention to detail. Is it good for counter-attack? Yes