Triumph Twist Drill 099803 Drill Bit Set 29 Pc Hss

Product Description

The TRIUMPH TWIST DRILL 099803 is a 29-piece jobber length drill bit set designed for metalworking and general multipurpose drilling. Each bit is manufactured from high-speed steel with an oxide finish and features a 135-degree split-point tip that starts on contact without walking or center-punching. The straight shank fits standard drill chucks. Bit sizes range from 1/16 inch to 1/2 inch in 1/64-inch increments, covering the full fractional range a working tech or machinist reaches for most often. The set is stored in a metal case and is rated for heavy-duty use. Licensed contractors, machinists, and field service technicians are the primary users.

This set is built for metalworking applications where a complete fractional inch range is needed on a single job. The split-point geometry reduces thrust and produces cleaner entry holes in steel, aluminum, and similar materials without a pilot hole. The 135-degree point angle is well suited to harder metals where a standard 118-degree bit would walk or deflect. At 4.25 inches overall length, these are standard jobber-length bits that fit benchtop drill presses, right-angle drills, and portable hand drills equally well. Tradespeople in HVAC, electrical, and plumbing will find this set covers the hole sizes used daily for panel knockouts, pipe hangers, and equipment mounting.

Key Features

• 29 pieces covering 1/16 inch to 1/2 inch in 1/64-inch step increments
• 135-degree split-point tip for self-starting, walk-free drilling
• High-speed steel construction with oxide finish for corrosion resistance and heat dissipation
• Straight shank fits standard keyed and keyless drill chucks
• 4.25-inch overall length suits drill presses and portable hand drills
• Metal storage case keeps bits organized and protected on the job

Compatibility

Designed as a general-purpose fractional inch drill bit set for use with any standard drill press, benchtop drill, or handheld power drill accepting straight-shank bits up to 1/2 inch.

Installation Notes

Secure the workpiece before drilling and confirm the chuck is fully tightened on the shank before applying power. Use cutting fluid or coolant when drilling hardened steel to extend bit life, even though these bits do not support coolant-through delivery. Worn or overheated bits should be replaced rather than resharpened in the field without proper grinding equipment. Follow applicable shop safety standards and wear appropriate eye protection during all drilling operations.