Dry grinding hand grinding plate Flexible adjustment of arc/knob adjustment of arc/dust vacuum Flexible adjustment of Two adjustment modes, the adjustment/knob to adjust The white pulley is unlocked on it. You can the hand grinding plate according to the workpiece to adjust the appropriate arc for grinding. The white pulley is locked below, and the radian can be adjusted to the left or right by rotating the pulley to achieve fitting with the workpiece. Suede Nylon Sticker is not easy to fall off with a variety of sandpapers Deformed hand grinding plate with lock wheel Size: 70 x 198mm Color: As Shown Material: ABS Package Contents: 1 * Hand-held sanding board Only 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.