C.K T3016 4-20 HSSE-Co Step Drill Bit 4-20 mm, 9 Steps, 1/4 inch Hex Shank

Drilling clean, accurate holes in thin sheet metal, stainless steel, or plastic often requires multiple drill bits and a lot of effort. The C.K T3016 4-20 step drill bit solves this by combining nine hole sizes into one tool, letting you enlarge holes progressively without changing bits.

Who is it for

Electricians, plumbers, HVAC technicians, and metal fabricators who frequently drill holes in panels, enclosures, or ductwork will appreciate the speed and convenience of a step drill. It is equally useful for DIY enthusiasts working on metal or plastic projects.

Main features

• HSSE-Co (cobalt alloyed high-speed steel) for durability and heat resistance
• Nine stepped diameters: 4, 6, 8, 10, 12, 14, 16, 18, 20 mm
• 1/4" (6.3 mm) hex shank fits standard drill chucks and impact drivers
• Spiral flute design for efficient chip removal
• Suitable for stainless steel, sheet metal, non-ferrous metals, plastic, and wood

Specifications

• Tool type: Step drill bit
• Material: HSSE-Co (high-speed steel with cobalt)
• Shank type: Hex
• Shank size: 1/4" (6.3 mm)
• Drilling diameter range: 4 mm - 20 mm
• Number of steps: 9
• Step diameters: 4, 6, 8, 10, 12, 14, 16, 18, 20 mm
• Flute type: Spiral
• Coating: Uncoated
• Drive type: 1/4" hex
• Packaging quantity: 1 piece

Tips

Use a centre punch to mark the drilling point and apply steady pressure. For thicker materials, drill a pilot hole first and use cutting fluid to extend bit life.