Steelmaster SD4-20MM Spiral Flute Step Drill Set - 4-20mm
$40.70

The Titanium Nitride coating significantly increases the tool life by providing the following benefits: 

Increased surface hardness to 85HRC

Ceramic surface, reducing friction by up to 30%

Especially resistant to cold welding

Suitable for cutting a wide range of materials

Part No. Sizes Included Step
Length
Over All
Length
Shank
Diameter
SD4-20MM 4, 6, 8, 10, 12,
14, 16, 18, 20mm
3.0mm 74.5mm 8mm