Precision Twist Drill 5998158 #8 HSS Jobber Length Drill Bit

The Precision Twist Drill 5998158 is a #8 High Speed Steel (HSS) Jobber Length Drill Bit engineered for reliable, precise drilling in a wide range of materials including steel, aluminum, brass, copper, and plastics. Manufactured by Precision Twist Drill — a trusted American brand with decades of cutting tool expertise — this bit delivers consistent performance for professional machinists, maintenance technicians, and serious DIYers alike.

Key Features:

• Size: #8 wire gauge diameter (0.1990 inches / 5.055 mm)
• Construction: High Speed Steel (HSS) for excellent heat and wear resistance
• Style: Jobber length — the industry-standard flute-to-shank ratio for general-purpose drilling
• Point Angle: 118° conventional split point for fast penetration and reduced walking
• Finish: Bright (uncoated) finish suitable for a broad range of materials
• Shank: Straight shank, compatible with standard drill chucks
• Manufactured to ANSI standards for consistent, interchangeable sizing

Precision Twist Drill bits are produced with tight tolerances and rigorous quality control, making the 5998158 a dependable choice for production drilling, repair, and fabrication work. The HSS construction handles moderate heat buildup without losing temper, extending tool life in demanding applications.