81155 #55 Jobber Drill Bit, HSS, 0.052 In. Dia, 1-7/8 In. OAL

The Irwin 81155 #55 Jobber Drill Bit is a precision wire gauge drill bit made from M-2 high-speed steel, engineered for general-purpose drilling in metal, plastic, and wood. This professional-grade bit delivers exact hole sizing—essential for applications like tapping and fitting fasteners—and maintains its sharp edge longer than standard steel bits.

Jobber-length drill bits like this one balance reach with control, making them ideal for both portable power drills and stationary drill presses. The #55 size (0.052 inch diameter) is a non-fractional wire gauge specification useful for precise hole work where standard fractional bits won't fit the requirement. Whether you're performing automotive repairs, maintenance tasks, or general construction work, this bit provides reliable performance across a range of materials and applications.

Features and Benefits

• M-2 High-Speed Steel Construction: Provides superior heat and wear resistance, keeping the bit sharp through extended use and demanding drilling tasks.
• Spiral Flute Design: The 4-flute spiral geometry is engineered for efficient drilling across metal, plastic, and wood.
• Chisel Point: Standard 118-degree point angle for reliable cutting performance.
• Straight Shank: Fits standard drill chucks on most portable and stationary drills for easy compatibility.
• Jobber Length: The 1-7/8 inch overall length with 7/8 inch flute depth suits typical drilling depths while maintaining control and stability.
• Right-Hand Rotation: Compatible with standard drill rotation for standard drilling applications.
• Individual Format: Sold as a single bit, allowing you to replace worn bits or add specific sizes to your toolkit without buying a full set.

Specifications

• Brand: Irwin
• Model: 81155
• Bit Diameter: #55 (0.052 inch)
• Shank Diameter: 0.052 inch
• Overall Length: 1-7/8 inch
• Flute Length: 7/8 inch
• Material: M-2 Grade High-Speed Steel (HSS)
• Type: Jobber drill bit, spiral flute
• Flutes: 4-flute
• Shank Style: Straight shank
• Point Type: Chisel point
• Point Angle: 118 degrees
• Cutting Direction: Right hand
• Applicable Materials: Metal, plastic, wood
• Cutting Edge: HSS