Model Number: GM-DB040 Brand Name: GOLDMOON Key Specifications/Special Features: HSS 5 Flute CountersinkFor countersinking bore-holes in wood and soft metals for countersink and fillister-head screws.Size Metric available:6mm-8mm-10mm-12mm-16mm-19mm-22mmSurface treatment are available:Galvanized finish,Nickel Plated,Chrome coated,Black finish,Sandblasted finish.Material can be selected according to customers' requirements.Drill Bits set are availableInch size are available