Precision Twist Drill 5995670 Cobalt Drill Bit Set 60 Pc

Product Description

The PRECISION TWIST DRILL 5995670 is a 60-piece cobalt jobber length drill bit set covering wire sizes 1 through 60 in a single indexed case. Built from M42 or equivalent cobalt high-speed steel with a gold finish, these bits handle hard metals, stainless steel, cast iron, and other demanding materials that standard HSS tooling cannot manage reliably. The 135-degree split-point geometry starts on contact without a center punch, reduces walking on curved or sloped surfaces, and self-centers to keep hole location tight. The straight shank fits standard three-jaw chucks across benchtop drill presses, floor-standing machines, and handheld power drills. This set is a go-to for maintenance professionals, machinists, and multi-trade technicians who drill metal daily.

The 5995670 set is rated for heavy-duty metalworking and multipurpose drilling applications in both shop and field environments. Wire gauge sizing from 1 to 60 covers the full range of small-diameter holes commonly required in HVAC sheet metal work, electrical panel knockouts, plumbing rough-in, and general fabrication. The plastic indexed case keeps each bit organized and protected between uses, reducing time spent searching for a specific wire size on the job.

Key Features

• Cobalt tool material with gold finish for increased heat and wear resistance in hard-metal drilling
• 135-degree split-point tip self-centers on contact, eliminating the need for a center punch on flat stock
• Straight shank fits standard three-jaw chucks without adapters
• Complete wire gauge set from 1 to 60 in a single indexed plastic storage case
• Meets ANSI and NAS 907 specification standards
• Heavy-duty performance rating for continuous metalworking use

Compatibility

Designed for use in any standard three-jaw chuck drill press or handheld power drill accepting straight shank bits sized within the wire gauge range of 1 through 60. Suitable for metalworking and multipurpose drilling applications per Series R18CO specifications.

Installation Notes

Install and remove drill bits only when the spindle is fully stopped and the chuck key is clear of the chuck. Secure workpieces firmly in a vise or clamp before drilling to prevent rotation. Use appropriate cutting fluid or coolant when drilling hard alloys or stainless steel to extend bit life, even though this set does not include coolant-through capability. Inspection and replacement of worn bits should follow standard shop maintenance practices.