1.Features:1. This tool is a high speed, low range spine adjusting tool, it can adjust your spine and arms and legs by manual assist2. It adopts uneven leg length analysis and use this tool to adjust spine3. Subluxation diagnosis is detecting people's spine and arthrosis and estimate if you have spine problems or joint shift by the reaction of your legs4. This chiropractic adjusting tool is use for cervical spondylosis,lumbago and health care, etc 2.Usage method:1. When used, the effect is better when there are stress points 2. When using, you need to adjust the intensity to the most suitable intensity 3. Hold the gun head tightly against your body, you can manually buckle and pull for correction 4. The greater the top strength, the greater the hitting strength, so you cant hit empty 5. Intensity adjustment, upwards reduce intensity, downwards increase intensity 3.Specifications:Adjustable Force: 80N-250NPacking Size: 19.5*11.5*4.5cmProduct Size: 15.5*7.5cmItem Type: Chiropractic Adjusting Tool