Alpha ThunderMax Spiral Flute 4-20mm Step Drill - 9STSM4-20TM

• 2x Life
• Drills & deburrs in one process
• Self-starting split point removes the need for a pilot hole
• Tempered black finish maximises lubricant hold, therefore assisting chip flow & heat dissipation
• Corrosion resistant finish
• 2 flute design for smooth cutting
• Made in UK
• Cut depth: Up to 3mm
• Shank: Non-slip 8mm
• Suits: Non-hammer action portable power drills
• Cutting speed: 400 - 1,500 RPM
• Ideal for: Non-ferrous metals, sheet metal and plastic up to 3mm thick. Stainless steel up to 1.5mm thick.

Sizes:

• 4-20mm | 9 Steps - 4, 6, 8, 10, 12, 14, 16, 18 & 20mm