Please browse below url to learn more about this compression spiral router bit: <br />(mobile only) https://www.eaglecnctec.com/wap/products/244-compression-bit.html <br /> <br />(PC only) https://www.eaglecnctec.com/products/244-compression-bit.html <br /> <br />Tool type: spiral cut <br />Flute type: compression (up and down cut) <br />Debris removing way: compress <br />Flute quantity: two <br />Coating: without <br />Raw material: carbide <br />Origin: mainland of China <br />Application: for cnc router using, good for cutting MDF, PVC, laminated board <br />Package: each compression spiral router bit is individually packed in a separate plastic case <br /> <br />All regular size includes: <br />3.175mm shank (1/8 shank): 3.175x15mm, 3.175x17mm, 3.175x22mm <br />4mm shank: 4x22mm <br />5mm shank: 5x22mm <br />6mm shank: 6x25mm, 6x22mm, <br />8mm shank: 8x35mm, 8x42mm <br />10mm shank: 10x35mm, 10x42mm <br /> <br />All router bits, one-stop shopping <br />From www.eaglecnctec.com <br />Please inquiry, sales@eaglecnctec.com