High quality, durable surfacing bit.  Each of the 3 inserts have 4 sides that can be rotated if dulling or damage occur. A wrench is included to rotate/replace individual carbide inserts. High quality Japanese carbide inserts. 
 
Shank Diameter - 0.25" (1/4")
Cut Diameter - 1.375” (35mm)
Max Cut Depth - 0.250" (1/4")
Flutes - 3
Max RPM - 12,000
 
All HCT bits are designed for cutting wood, non-ferrous metal (aluminum/brass/soft metals), and synthetic/plastic-based materials like epoxy and sheet plastics. Bit performance varies with machine type, feeds/speeds set, and the stock material.