Sanding sleeves require drum mandrels to be fitted onto them. The size of the sanding sleeve should match the diameter and length of the drum. It's crucial to ensure that the sleeves are adaptable to the drum's size to achieve proper fit and performance. Good accessories fit for drum sander or rotary grinders. used with sanding sleeves for deburring, grinding, shaping, or carving nut, wood, plastic, metal, stone, jade, ceramics, and other DIY production. Push the rubber mandrel into the sand drum, and then tighten the top screw. Mandrel head size can be adjusted with the screw on the top. Adjust it smaller to slide in sand drum or adjust it bigger to hold sand drum tight.