Whether you are a amateur or a beginner athlete, It can help you with strength training, simple and practical. Features: It is detachable, does not take up space, and you can use it to keep your muscles up when you are outdoors, traveling, in the office, or at home. It stimulates more muscle groups, including chest exercises, wrist exercises, arms, back, and shoulders. High strength metal spring, strong elasticity, durability and stability. The handle is made of thickened anti-slip foam, which is both anti-slip and comfortable. Three strength levels(20KG or 30KG or 40KG) to choose, to meet different exercise needs. Specifications: Material: IronandStainless SteelandNBR Spronge Colour: BlackandBlue Package Size: 23 x 26cm Package Contents: 1 x Twister Arm Exerciser Please note: Due to manual measurement, there might be a tolerance in the product size. Due to the lighting effects and shooting angles, the color of the item and that shown in the picture might have a nuance. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.