Check the listing for details. CNC Spoilboard Surfacing Router Bits Slab Flattening Wood Planer 1/2" 1/4"Shank. Condition: New. Listed at 33.99 USD. Surfacing Router Bit: Size Available: Option 1: Shank=1/2"(12.7mm);Diameter=2.36inch(60mm);Length=80mm;Tooth:3T Option 2: Shank=1/2"(12.7mm);Diameter=3inch(76mm);Length:75mm;Tooth:4T Option 3: Shank=1/2"(12.7mm);Diameter=1.5nch(38.1mm);Length:60mm;Tooth:4T Option 4: Shank=1/4"(6.35mm);Diameter=1.5inch(38.1mm);Length:60mm;Tooth:2T Option 5: Shank=1/4"(6.35mm);Diameter=1nch(25.4mm);Length:45mm;Tooth:2+2T V Router Bit: Size Available: Option 1: Shank=1/2"(12.7mm);Diameter=1.5inch(38mm);Length=76mm;Tooth:2T;Degree=90 Specification: Type:Insert Router Bit Shank Diameter:1/2"(12.7mm);1/4"(6..35mm) Material:High quality carbon steel Hardness of Indexable Insert：HRA95 Material of Indexable Insert:Solid Carbide Delivery Content: 1Pc Router Bit or 10pcs inserts(subject to your choice).