The Audio Tech Ni Power Hand Cleaner Series uses a unique adhesive roller for all models, and is intended to efficiently remove dust and material forces from resin plates, glass, various film sheets, metal plates, etc. Removes almost all fine debris. Dramatically reduces the static charge of the hand cleaner: The handle part of all models has been changed to conductive materials, and the static of the hand cleaner itself has been greatly reduced.(HC-705 exception) Greatly improved maneuverability, achieved significant weight reduction and (up to 25% lighter compared to the 600 series) Grip material and shape optimized.Designed for ease of use, it reduces scratches caused by contact with the grip and material.It also simplifies the retention part of the roller and makes it easier to change rollers. Bearing specifications: Low dust bearing is adopted in the roller, reducing working load and reducing dust. Variety of rubber material variations, adhesion, and sizes.You can choose according to your needs at a low cost.