For metal working,cutting Steel,Cast Iron,Copper,Aluminum,etc. 12pcs Solid Carbide Drill Bits,1mm 2mm 3mm 3.175mm(1/8") 4mm 5mm 6mm 6.35mm(1/4") 7mm 8mm 9mm 10mm each.

• Diameter:1mm-10mm
• Number of Flute:2
• Flute Length:14mm-43mm
• Overall Length:38mm-70mm B0D6YK1B1N