81121 Jobber Drill Bit, #21, Hss, 3-1/4 In.

The Irwin 81121 is a #21 jobber drill bit made from M-2 grade high speed steel, engineered for precise hole drilling in metal, plastic, and wood. This straight shank bit delivers the durability and heat resistance needed for both professional and DIY applications, from automotive work to home improvement projects and stationary drill press use.

The bright finish protects against corrosion and wear, while the straight shank design ensures easy compatibility with handheld drills, bench drills, and other standard drill equipment. The spiral flute geometry with chisel point is designed for accurate holes, making this bit suitable for applications where exact hole sizing matters.

Features and Benefits

• M-2 Grade High Speed Steel: Exceptional durability and heat resistance allow this bit to drill through tough materials with ease and longevity.
• Bright Finish: Protects the bit against corrosion and wear, enhancing both appearance and performance.
• Straight Shank Design: Compatible with a wide variety of drill types, from handheld to bench drills, ensuring a secure fit and optimal performance.
• Spiral Flute, 4-Flute Construction: Engineered for drilling in metal, plastic, and wood.
• Chisel Point: Features a 118-degree point angle for precise drilling performance.

Specifications

• Brand: Irwin
• Model: 81121
• Size: #21 wire gauge (0.159 in diameter)
• Overall length: 3-1/4 in
• Flute length: 2-1/8 in
• Flute type: Spiral, 4-flute
• Shank: Straight, 0.159 in diameter
• Point type: Chisel
• Point angle: 118 degrees
• Material: M-2 grade high speed steel (HSS)
• Cutting direction: Right hand
• Applicable materials: Metal, plastic, wood
• Finish: Bright
• Quantity: 1 piece, carded