Feature:Alloy handle is strong with high hardness, wear-proof and very durable.It is generally used on electric trimmers or engraving machines for wood slotting. It's very simple to use.Make your work more efficient.An essential tool for woodworkers, wide applications for slotting, engraving, cutting, milling, etc.Specification:Material: AlloyColor: YellowShank Diameter: 1/4"Product dimension: Radius: 1/2", 3/8", 1/4", 1/8"1/2" R Cutter diameter:1-1/2"3/8" R Cutter diameter:1-1/4"1/4" R Cutter diameter:1"1/8" R Cutter diameter:3/4"1/2" R Total length:2-1/2"3/8" R Total length:2-3/8"1/4" R Total length:2-1/4"1/8" R Total length:2"Package list:4 * Router BitNote:The actual product color may deviate from the photo due to light.There may be a slight deviation in the measurement of Product.