1) Scientific Exercise Wide Application This hydraulic arm exerciser provides a scientifically structured workout for the upper body. It suits beginners and veterans alike. Use it to exercise the wrists, arms, shoulders, chest and back all at once, while developing grip and strengthening fingers and wrists. It helps increase upper body strength and overall fitness. 2) Durable Material Constructed from density double carbon steel, this device is strong and durable. It has undergone 100000 endurance tests to minimize deformation and breakage. The ergonomically designed PU handle offers a comfortable grip, and the antislip texture helps prevent slips for a safer workout. 3) Adjustable Resistance The power twister uses a rotating knob for stepless resistance adjustment. This allows you to tailor the difficulty to your fitness level and goals. In addition to arm training, it can help reduce abdominal and arm fat and assist in building chest muscles. 4) Hydraulic Design The hydraulic power twister features safer micro rebound and avoids violent rebound. It returns softly to the starting position, providing a more effective, stable, and safer exercise experience. Use scenarios At home: incorporate into a daily routine to train wrists, arms, shoulders, chest and back while strengthening grip. On the go: compact and portable for office breaks or travel, enabling quick strength maintenance and mobility. Training and conditioning: suitable for athletes seeking to improve upper body strength and grip.