Materials: Router bits is made of tungsten alloy steel, which is wear-resistant, rust-resistant and non-deforming, which increases its service life and facilitates operation. Design: Router Bits is made from top quality bearings and is sturdy and durable. The yellow layer on the surface is designed to be aesthetic and anti-rust. The lower part is made of high speed steel with rounded chamfers to facilitate tightening. Dimensions: 8mm router bit is available in three different sizes to meet various needs. 85.5mm x 28.6mm, 90.3mm x 25.4mm, 86mm x 38.1mm. Compatible with: Router bit can be used in woodworking machines such as trimmers, vertical skeleton mills, mills cutters and automatic carving machines, etc. Range of applications: Router bit can be used to cut wood such as pine, solid wood, MDF, chipboard, panel density and other woods. It cannot be used to cut metal, glass, etc.