Made of high quality wool and metal, it is durable. Commonly used for diy polishing, such as wood, metal, mold polishing. Suitable for cleaning/polishing jewelry/gems, glass, watches, crystals, triggers, feeding ramps, automobile/motorcycle engine parts and molds. With a carefully designed plastic box, you can use it with peace of mind. You will receive 100 polishing wheel grinding heads, which can meet your daily use needs. describe: Name: polishing wheel grinding head Quantity: 100pcs/ box Diameter of clamping rod: 3mm Material: wool + metal colour: white Package Contents: 100 x Polishing wheel grinding head 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.