Size detail: each of the grinding head is about 3/16 inch/ 4.8 mm in diameter, 7/8 inch/ 25 mm in length, and the shank part measures about 1/8 inch/3 mm in diameter, total length is . 1-6/8 inch/ 49 mm<br> Solid material: burr grinding stone file is made of grinding stone with good hardness, suitable for metal polishing, especially for steel parts after heat treatment, and not easy to get broken<br> Applicable occasions: these polishing grinding tools are widely applied for machinery, bearing, mold, casting parts deep hole, different internal , welding spot, welding seam grinding and burr grinding<br> Package content: comes with 100 pieces burr grinding stone files and 1 piece storage box, convenient to carry and store, enough to apply in and meet your replacement needs<br> Colour:Pink + Silver<br> Material:Chrome steel jade + alloy<br> Size:49x4.8mm<br> Package Contents:<br> 100 x Burr Grinding Stone File<br> Only the above package content, other products are not included.<br> 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.