RUKO HSS Step Drill Bit 1/4 inch-3/4 inch, 9 Steps, 10mm Shank

This RUKO step drill bit stands out with its 9-step design covering 1/4" to 3/4" in 1/16" increments, allowing one tool to replace multiple twist drills for thin sheet metal and plastics. Made from bright HSS with a self-centering tip, it drills, deburrs, and reams in a single operation.

Highlights

• 9 steps from 1/4" to 3/4" (6.35–19.05 mm), 1/16" increments
• High-speed steel (HSS) with bright finish, 118° point angle
• Self-centering tip, spiral flute, deburring and reaming capability
• Cylindrical 10 mm shank fits standard drill chucks
• Max material thickness 4 mm; suitable for steel, non-ferrous metals, plastics, thin sheets

In daily use

The step drill bit is ideal for electricians, plumbers, and metalworkers who need clean, burr-free holes in thin materials. The self-centering tip prevents walking, and each step enlarges the hole precisely. The bright finish reduces friction and improves chip flow.

Full specifications

• Material: HSS (High-Speed Steel)
• Drill type: Step drill bit
• Drilling diameter range: 1/4" - 3/4" (6.35 - 19.05 mm)
• Number of steps: 9
• Step increments: 1/16" (1.59 mm)
• Shank type: Cylindrical
• Shank diameter: 10 mm
• Total length: 78 mm
• Surface finish: Bright (uncoated)
• Point angle: 118°
• Max material thickness: 4 mm
• Tool holder compatibility: Drill chucks
• Product series: RUKO 101 Series
• Flute type: Spiral flute
• Self-centering tip: Yes
• Deburring capability: Yes
• Reaming capability: Yes

Final note

For precise, stepwise drilling in thin materials, this RUKO bit delivers consistent performance and long tool life.