[Upgraded Size & Comfort Grip] The new EAST MOUNT Twister Arm Exerciser is expanded to 17.5 inches, helping you maintain proper posture and form during every workout. Redesigned non-slip handles provide a more comfortable and secure grip, ensuring better control and performance. [Hydraulic Power Core Safer & Smoother Resistance] Unlike traditional spring devices, this arm trainer uses a reinforced hydraulic cylinder that delivers smooth, consistent tension through every rep. With controlled micro-rebound, it protects your joints, prevents sudden snap-back, and ensures long-lasting durability. [Adjustable Resistance 22440 lbs] Easily rotate the knob to adjust resistance from beginner-friendly 22 lbs up to an intense 440 lbs. The hydraulic system provides continuous tension, making it ideal for toning, muscle building, and progressive strength training at home, in the gym, or on the go. [Stable & Reliable Structure] Engineered with a heavy-duty steel frame and a safe