COMOWARE Cobalt Drill Bit Set – 115Pcs M35 HSS, 1/16" to 1/2", Indexed Storage Case

Overview

Upgrade your metalworking toolkit with the COMOWARE Cobalt Drill Bit Set. Crafted from M35 cobalt-enhanced high-speed steel, these bits deliver superior wear, heat, and abrasion resistance compared with standard HSS. In real-world use, you may experience fewer bit changes when drilling through stainless steel, cast iron, or hard alloys, along with cooler operation under load that helps maintain accuracy over long projects.

Key benefits

• 5% cobalt content boosts hardness and heat resistance for demanding jobs.
• 135-degree split-point provides self-centering starts with less guiding pressure.
• Twist shank design helps clear chips, promoting smoother progress.
• Metal indexed storage case keeps every size visible for quick selection and organization.
• Comprehensive range: 115 pieces across 29 fractional sizes, 26 letter sizes, and 60 numbered bits.

What’s included

• 29 fractional sizes from 1/16" to 1/2" (in 1/64" increments).
• 26 letter sizes (A–Z) for diverse hole sizes and projects.
• 60 numbered bits (#1–#60) covering common drilling tasks.
• Storage case with a metal index for fast size lookup.

Materials and uses

The bits excel at drilling hardened metals and alloys while remaining versatile for copper, aluminum, steel, copper, plastic, and wood. The premium cobalt alloy helps maintain sharpness over multiple uses, while the self-centering tips reduce walking on initial contact. The full range lets you tackle both small pilot holes and larger holes without changing sets.

Usage tips

• Match drill speed and feed to the material to maximize tool life.
• Keep cooling lubricant handy to minimize heat buildup and extend bit life.
• Peck drilling and frequent withdrawal helps clear chips and prevent clogging.

Note: This description highlights potential performance tendencies based on typical metalworking scenarios. Results can vary by material, drill equipment, and operator technique.