Hand grinder Grinding Support, Compatible with most hand grinders.Detachable fixed bracket, Suitable for grinders with a fixed body diameter of about 50-60MM.Concentricity adjustment, Compatible with grinders of different diameters.Charging version, Rechargeable version: about 5 - 6H for a full charge, About 50 minutes of continuous grinding.50-300 rpm variable speed adjustment, Reminder: The higher the speed, the greater the torque. Can Forward Reverse, reverse automatic rebound.Material: Metalcolour: As shownPackage Contents: 1 x Host1 x USB charging cableOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.