Drillco 350N Nitro 29-Piece Mech Length Drill Bit Set HSS Gold Oxide

Description

Product Overview

The Drillco 350N Nitro 29‑piece mechanics length drill bit set is engineered for professionals who demand precision, durability, and efficiency on every job. Constructed from high‑speed steel (HSS), each bit offers a superior balance of hardness and toughness, ensuring long‑lasting wear resistance even under demanding conditions. The gold oxide finish provides a thin protective layer that resists corrosion while maintaining the cutting performance of the underlying steel. A 135° split point delivers rapid start‑up and reduces walking, while the flats‑ground shank on three sides minimizes slippage in standard drill chucks, giving you confidence and control during high‑torque applications. The set spans sizes from 1/16″ to 1/2″ in 1/64″ increments, covering a broad spectrum of fastening and drilling tasks commonly encountered in automotive repair, machinery maintenance, and general construction.

Usage

Designed for mechanics, technicians, and DIY enthusiasts alike, this set excels in environments where reliability and speed are paramount. Whether you are removing rusted bolts in a vehicle engine bay, installing hardware in a metal frame, or performing routine maintenance on industrial equipment, the Drillco 350N Nitro bits provide consistent performance. The spiral flute design evacuates chips upward, preventing clogging and extending bit life, while the flats shank ensures a secure grip in both keyed and keyless chucks. The set’s compact packaging makes it easy to transport to job sites, and the incremental sizing allows you to select the exact diameter needed without over‑drilling or damaging surrounding material. Ideal for automotive workshops, machine shops, and home garages, these bits are suited for steel, stainless steel, and other common metals.

Why Choose Us

Drillco Cutting Tools has a legacy of over three decades in producing high‑quality cutting solutions for professionals worldwide. Our commitment to rigorous testing, precise heat‑treatment processes, and strict quality control ensures that every bit meets exacting standards. The 350N Nitro series benefits from a proprietary gold oxide coating that offers the same performance as uncoated HSS while providing added corrosion resistance. Each bit is individually inspected for dimensional accuracy, tip geometry, and surface finish, guaranteeing a reliable fit and optimal cutting action. In addition, Drillco stands behind its products with responsive customer support, a clear warranty policy, and easy access to replacement parts, giving you peace of mind long after the purchase.

Key Features

• High‑speed steel construction delivers exceptional hardness and wear resistance for long service life.
• Gold oxide coating provides corrosion protection while maintaining cutting efficiency.
• 135° split point starts quickly and reduces walking, improving accuracy on tough materials.
• Flats‑ground shank on three sides prevents slippage in standard drill chucks, enhancing torque transfer.
• Comprehensive size range from 1/16″ to 1/2″ in 1/64″ steps ensures the right fit for any job.
• Dedicated customer support and warranty coverage for hassle‑free after‑sales service.

FAQ

What materials are these bits suitable for?

The Drillco 350N Nitro bits are optimized for drilling steel, stainless steel, and other common metals. The high‑speed steel tip and gold oxide finish allow them to handle both hardened and softer alloys without excessive wear.

How does the gold oxide finish differ from black oxide?

Gold oxide is a thinner oxide layer that primarily serves to identify cobalt‑based steel tools. Its performance is comparable to uncoated bits, offering similar hardness and cutting ability while providing a subtle visual cue. Black oxide, by contrast, is a thicker coating used mainly for corrosion resistance on carbon steel tools.

Can I use these bits in a keyless chuck?

Yes. The flats‑ground shank on three sides is designed to reduce slippage in both keyed and keyless chucks, ensuring a secure grip and efficient power transfer during high‑torque operations.

What is the advantage of the 135° split point?

The 135° split point creates a sharper tip that initiates drilling with less force, reducing the tendency of the bit to wander on the workpiece surface. This results in cleaner holes and less material deformation.

Is there a warranty on this set?

Drillco provides a limited warranty covering manufacturing defects for a period of one year from the date of purchase. Should any issues arise, our customer service team will assist with troubleshooting, replacement, or repair as appropriate.