Irwin Hanson 10225 4-Piece Unibit Step Drill Bit Set HSS

The Irwin Hanson 10225 is a professional-grade 4-piece Unibit step drill bit set designed for drilling multiple hole sizes in thin materials with a single bit. This comprehensive set includes step drill bits #1, #2, #4, and covers 21 different hole sizes, making it an essential addition to any toolbox for electrical, HVAC, and metalworking applications.

Key Features:

• High-speed steel (HSS) construction for durability and long tool life
• Four Unibit step drills covering 21 hole sizes from 1/4" to 1-3/8"
• Single-flute cutting edge for faster, cleaner holes in thin materials
• Self-starting tip requires no center punch
• Ideal for drilling sheet metal, plastic, wood, and other thin materials
• Laser-etched size markings for easy hole size identification
• 3-flatted shank prevents slipping in drill chuck

Step drill bits are designed to drill clean, burr-free holes in materials up to 1/8" thick, eliminating the need to change bits for different hole sizes. Perfect for electricians, HVAC technicians, and metal fabricators who need to drill precise holes quickly and efficiently.