15/16 in x 18 in High Speed Steel Extra Long Drill Bit - Extra Reach

In this review the Drill America 15/16 in x 18 in DWDDL series drill bit is evaluated for tradespeople and maintenance techs who need extra reach in metal drilling tasks. The bottom line: it is a dependable, general purpose extra long drill bit that pairs solid cutting performance with the toughness of high-speed steel, making it a sensible choice when reach matters more than specialty coatings or extreme wear life.

Key Features

• High-speed steel construction: provides a balance of hardness and toughness for wear resistance across a broad range of iron and steel materials.
• Extra long length: 18 in length offers reach for deep or hard-to-access holes where standard bits cannot reach.
• Black oxide treatment: adds lubricity and helps retain coolant near the cutting edge to improve chip flow and reduce heat.
• Spiral fluted design: evacuates chips up and out of the cut when run in a counterclockwise direction, reducing clogging during long-hole drilling.
• Round shank: fits a wide variety of toolholding systems for flexibility in shop or jobsite setups.

Who It's For

The DWDDL 15/16 in x 18 in is aimed at professionals and experienced DIYers who frequently drill through thicker plates, stacked materials, or hard-to-reach locations and need a single, long bit that handles a variety of iron and steel workpieces. It is especially suited to maintenance shops, fabricators, and contractors who prefer the simplicity and toughness of high-speed steel tools.

Those who want maximum wear life for prolonged production runs or who work primarily in nonferrous materials may prefer a coated or carbide option; likewise, casual users who rarely need extended reach might be better served by standard-length bits that are less prone to bending under side load.

Pros & Cons

Pros

• Good general purpose performance in ferrous materials thanks to durable high-speed steel.
• Extra long reach handles deep or awkward drilling tasks without extensions.
• Black oxide finish improves lubricity and chip control for cleaner holes.

Cons

• Some customers report mixed durability under heavy use, including rare breakage; careful technique and correct speeds are important.
• Uncoated HSS will wear faster than specialty coated or carbide drills in high-volume production.

Specifications

Our Verdict

The Drill America DWDDL 15/16 in x 18 in is a practical choice for anyone who needs extended reach and reliable cutting in iron and steel families. It delivers good value for maintenance, fabrication, and fieldwork where toughness and chip control matter, though users expecting extreme wear life should consider coated alternatives for heavy production use.

Frequently Asked Questions

Can this bit be used in a standard drill chuck?
Yes; the round shank fits many chucks and toolholding systems, though secure gripping or a collet may be needed for heavy torque.

What materials is this bit best for?
It is designed for a broad range of materials in the iron and steel families and performs well on mild and alloy steels.

Does the black oxide coating make it last longer?
The black oxide adds lubricity and helps with coolant retention and chip control, but it is not a wear-resistant hard coating; wear life depends on speed, feed, and application.