Cobalt Stepped Point Drill Bit Set 29pc - Gold Oxide Finish

Our review of the 29 piece Cobalt Stepped Point Drill Bit Set finds it best suited for mechanics, metalworkers and serious DIYers who need a reliable set for hardened materials. The single biggest reason to buy is the combination of a 135 degree split point and cobalt construction, which starts easier and reduces heat compared with standard bits, letting users drill through steel, brass and acrylic with fewer re-drills and less binding. The round index case is also surprisingly durable and convenient for shop storage or carrying to a job.

Key Features

• Gold oxide finish: Reduces friction and protects bit surfaces so bits last longer under heavy use.
• Cobalt construction: Improves hardness and heat resistance for drilling hardened metals and prolonged use.
• 135 degree split point: Starts drilling without walking and cuts faster with less pressure on the workpiece.
• 3-flat shank design: Prevents spinning in a keyed chuck for secure, accurate drilling on most sizes.
• Complete inch range: Includes sizes from 1/16 in to 1/2 in in 64ths for precise incremental hole enlarging or new hole creation.
• Round indexed case: Shatter proof and water resistant, designed for easy carry and organized storage.

Who It's For

This set is aimed at professionals and experienced hobbyists who frequently drill into hard metals such as steel, brass and other hardened alloys; the cobalt blend and stepped point geometry make it a good choice for engine work or metal fabrication where bit life and cutting quality matter. It is also useful as an enlarger set for someone who needs to open up existing holes in acrylic or metal without buying single specialized bits.

Less experienced users who only drill soft materials or who want ultra-precise diameter tolerances for finishing may prefer dedicated carbide bits or a matched fractional set. Also, those looking for very cheap, occasional-use bits may find this set more capacity than they need.

Pros & Cons

Pros

• Excellent cutting performance on hardened steel and metal due to cobalt and stepped point geometry.
• Comprehensive fractional inch range from 1/16 in to 1/2 in to cover most common hole sizes.
• Durable, compact round case that is water resistant and easy to carry.
• Gold oxide finish helps reduce heat and extends bit life under heavy use.

Cons

• Some users report mixed opinions on value for money compared with other options.
• Sizes 11/64 in and smaller have round shanks, which may not resist twisting as well in some chucks.

Specifications

Our Verdict

The 29 piece Cobalt Stepped Point set is a solid choice for anyone who needs durable, high-performing bits for hardened metals; the 135 degree split point and cobalt alloy deliver cleaner holes and longer life under heavy use. For professionals and dedicated hobbyists who drill metal regularly, it represents a practical value despite mixed opinions on price, thanks to the included range and protective round case.

Frequently Asked Questions

Can these bits drill hardened steel?
Yes, the cobalt construction and stepped point design make them suitable for hardened steel and other tough metals.

Do all sizes have a 3-flat shank?
Most sizes have a 3-flat shank to prevent spinning; sizes 11/64 in and smaller have round shanks.

Is the case durable for jobsite use?
The set ships in a shatter proof, water resistant round index designed for easy carry and shop storage.