Features 1、FOR SMOOTH SURFACES AND CURVED EDGES: Made of good quality material, wear resistant and durable, often used for smooth surfaces and curved edges 2、EASY TO INSTALL AND SIMPLE TO REPLACE: 120Pcs sanding sleeves are used with 12Pcs sanding drums, easy to install and simple to replace 3、POLISHING SOFT AND HARD MATERIALS: Suitable for polishing soft and hard materials, such as home decoration, artwork, wood products and soft metals, etc. 4、GOOD POLISHING EFFECT: This sanding drum set come with small size, good polishing effect, and high efficiency 5、WIDELY USED IN INDUSTRIES: Sanding sleeves drum mandrels are widely used in industries such as microelectronics, suitable for your polishing needs Specification Item Type: Sanding Drum Set Material: Silicon carbide Sanding Sleeves Specifications(40pcs each): 1/4in (120#), 3/8in (120#), 1/2in (120#) Sanding Drum Outer Diameter(4pcs each): 1/4in, 3/8in, 1/2in Sanding Drum Shank Diameter: 1/8in Package List 120 x Sanding Sleeves 12 x Sanding Drum