The Irwin Unibit #13 is a self-starting step drill bit made from high-speed steel, designed for precision and efficiency when drilling into thin materials. Its single-flute cutting edge provides greater control, and the self-starting SpeedPoint tip prevents walking and penetrates faster than previous models. The hex shank ensures a secure grip, preventing slipping in the drill chuck. This versatile bit is ideal for creating clean, round holes in materials such as mild steel, copper, brass, aluminum, plastic, and laminates.

• Size: #13, with a maximum hole diameter of 1-1/8 inches.
• Material: High-Speed Steel (HSS).
• Shank: Hex shank (7/16 in.) to prevent slipping.
• Design: Single-flute cutting edge for control and a self-starting SpeedPoint tip.
• Applications: Ideal for drilling into thin materials like stainless steel, copper, brass, aluminum, plastic, and laminates.