#4M 4mm - 22mm High Speed Steel Metric Self-Starting Unibit - Unibit

The Unibit 11104 #4M is a professional-grade metric step drill engineered for precise and efficient hole drilling in various thin materials common in automotive and industrial applications. Constructed from high-speed steel, this self-starting unibit ensures exceptional durability and consistent performance, allowing technicians to create clean, accurate holes from 4mm to 22mm without requiring a pilot hole.

Key Features

• Metric Sizing (4mm - 22mm): Accurately drills 10 distinct metric hole sizes, making it suitable for European and international specifications and a broad spectrum of fastening requirements.
• Self-Starting SpeedPoint Tip: Engineered for rapid material penetration, this innovative tip prevents bit "walking" and ensures precise hole placement from the initial contact, eliminating the need for center punching.
• Single-Flute Design: Provides enhanced control and a smoother cutting action through each step, minimizing burring and improving the overall finish quality.
• 3-Flatted Shank: Guarantees a secure, non-slip grip within drill chucks, maintaining stability and optimal power transfer during high-torque drilling operations.
• High-Speed Steel (HSS) Construction: Manufactured from robust HSS for extended tool life, superior wear resistance, and reliable performance in demanding professional environments.

Applications

This Unibit is ideal for creating clean, perfectly round holes in various thin materials up to 5mm thick, including stainless steel, copper, brass, aluminum, plastic, and laminates. Professional technicians will find it invaluable for tasks such as installing custom components, fabricating brackets, modifying sheet metal panels, and routing cables in automotive chassis or industrial control cabinets. Its ability to achieve multiple hole sizes with a single tool streamlines workflow in vehicle service, maintenance, and fabrication shops.

Specifications

• Number of Steps: 10
• Hole Sizes: 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm
• Maximum Material Thickness: 5mm