Feature: 1. Can change the head, multi‑purpose use, can meet the needs of different people. 2. Adopts 304 stainless steel material, corrosion resistance. Made of exquisite workmanship, durable to use. 3. Heat resistance, low temperature strength, good mechanical properties, easy to use. 4. 50N / 100N / 150N / 200N / 250N / 300N 6 strength, effective massage effect. 5. Lightweight, safe, durable, portable, sturdy, suitable for home massage for everyone. 15 minutes a day can reduce the pressure on the neck, good effect. Specification: Condition: 100% Brand New Item Type: Spine Correction Massager Material: Stainless Steel 6 Strength: 50N·100N·150N·200N·250N·300N Functions: Body massage: provide stable and powerful strength, more effective, more comfortable massage, suitable for scoliosis, thoracic vertebra and spine pain, can be used for joint relief, cervical vertebra adjustment, thoracic vertebra massage, cervical vertebra massage, whole body massage healthy care Physical pressure massage principle: imitate the hand massage, adjust the bones, straighten the spine, immediately dredge upright, relieve pain, make people energetic.Contact with the skin below 2.3cm, effectively adjust the bones, massage once, make the relaxation time longer.Will provide stability and strong power, more effective, more comfortable Instructions for use: 1. When using, do not hit the air, and the rubber head must be strong. 2. Adjust the bottom according to the use needs 3. 4 Heads of the massager, according to the need to install and replace the massage head Operation instructions: 1. Place the handle on the palm of your hand.Place the rubber head on the part to be punched and apply force downward.Pull the black portion of the position into the palms of your hand, then pull back and forth. 2. When using high frequency frequently, add lubricating oil appropriately.. Package List: 1 x Spine Massager4 x Functional Heads 2 x Rubber Heads 4 x Rubber Ring 1 x Storage Box 1 x PU Leather Cover