uxcell 0.75mm Tip Spiral Flute Carbide PCB Micro Drill Bits Engraving Tool 10 Pcs Total Weight: 39g; Cutting Diameter: 0.75mm/0.03" Shank Diameter: 3.175mm/1/8"; Cutting Depth: 10mm/0.4" Product Name: Micro Drill Bit; Package Content: 10 x Micro Drill Bit, 1 x Plastic Box Material: Carbide; Color: Blue,Silver Tone Working Range: PCB, CNC; Total Length: 38mm/1.5"