" Ball chisel file grinding head: finely polished, the cutting edge is wear-resistant, and is particularly suitable for processing. Wear-resistant wear balls: Carbon steel quenching process can increase wear resistance and have long service life. Function: Widely used in engraving, crafting, grinding, polishing, wood finishing and other wooden materials. Practical Accessories: Suitable for DIY enthusiasts or amateurs and craft enthusiasts, it is a practical accessory for woodworking tools, Size: 14mm Material: Carbon Steel Color: Black Package Contents: 2 x Ball End Mills for Wood Carving Only the above package contents are included, Other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the actual item. The allowable error of measurement is +/- 1-3cm. "