Sincereetali10Pcs router bits work hard and stay sanded, used for carving, cutting, engraving, milling, hand router detail work. Features: When you tried one of the bits you got it to 300mm/min with a 2mm layer depth and it was like going through butter (in a 19mm pine board), without the X/Y motors skipping. It can probably do even better, faster and greater layer depth. It is much faster than using a drill to create holes. They cut cleanly and can last quite a while and you will love these bits for the work you do. Not only use them on a CNC router such as carving, cutting, engraving, milling, you can also use them in the handheld router for detail work etc. Suitable for hard/soft woods, surface machining, 3D relief carving, three-dimensional sculpture etc. Features: Material: Tungsten Steel Item Size: 22 * 3.175mm / 0.87 * 0.125in Package Weight: 42g / 1.48oz Package Size: 55 * 54 * 9mm / 2.17 * 2.13 * 0.35in Note: Make sure you hold it securely. There is some kickback interspersed with the almost effortless cutting, so be careful as your cuts with a rotary tool flex shaft are totally freehand. It doesn't like to be at an angle, please always try to go 90 degrees to the work. Packing List: 10 * Router Bits