Greenlee GSB04 7/8" Multi-Hole Step Bit (#4) Metal Cutting Tool with 12 Drill Stages

Greenlee GSB04 7/8" Multi-Hole Step Bit (#4) Metal Cutting Tool with 12 Drill Stages

Professional multi-material cutting solution with patented split-step design

The Greenlee GSB04 7/8" Multi-Hole Step Bit delivers professional-grade cutting performance across mild steel, aluminum, brass, copper, wood, fiberglass, plastics and laminates. Featuring a patented split-step design with 12 drill stages ranging from 3/16" to 7/8", this metal cutting tool optimizes chip load for fast, smooth cutting and maximizes holes per charge. The three-flat shank design ensures compatibility with all 1/2" drill chucks for versatile professional applications.

Professional Features & Benefits

• 12 Drill Stages: Provides versatile sizing from 3/16" to 7/8" diameter for multiple hole requirements in a single tool
• 10 Gauge Sheet Metal Capacity: Handles up to 3.5mm thickness for demanding metalworking applications
• Progressive Cutting Edges: Balanced aggression maximizes torque efficiency and minimizes stalling during operation
• Improved Double Flute Design: Superior chip evacuation enhances cutting speeds and extends tool life
• Durable Split-Point Tip: Ensures fast, accurate material penetration for precise hole placement
• Three-Flat Shank: Universal compatibility with all 1/2" drill chucks for professional versatility
• USA Manufacturing: Made in United States for consistent quality and reliability

Technical Specifications

• Country Of Origin: United States
• Maximum Drill Diameter: 7/8" (22.2 mm)
• Maximum Sheet Metal Thickness: 10 gauge (3.5 mm)
• Minimum Drill Diameter: 3/16" (4.8 mm)
• Number Of Drill Stages: 12
• Product Type: Multi-hole Step Bit

Installation & Operation

1. Mount the step bit securely in a compatible 1/2" drill chuck using the three-flat shank design.
2. Select appropriate drilling speed based on material type and thickness specifications.
3. Position the split-point tip at the desired hole location for accurate material penetration.
4. Apply steady pressure while allowing the progressive cutting edges to advance through material stages.
5. Monitor chip evacuation through the double flute design and adjust speed as needed for optimal performance.
6. Complete drilling operation and inspect hole quality before proceeding to next application.

Professional Applications

• Electrical panel and enclosure fabrication
• HVAC ductwork and sheet metal installation
• Plumbing and mechanical system modifications
• Industrial maintenance and repair operations
• Construction and renovation projects
• Automotive and equipment service work
• General metalworking and fabrication tasks

Why Choose Greenlee Quality?

Greenlee’s patented split-step design and USA manufacturing ensure reliable performance across demanding professional applications. The laser markings provide quick product identification, while the durable construction and improved flute design deliver extended tool life and consistent cutting performance for professional tradespeople and contractors.