The Original Angle Drilling Attachments, Made in the USA

For more than a century, Terry Tools has designed and manufactured dependable precision angle and flexible drilling attachments that let you drill, countersink and deburr in the tightest close-quarter spaces.

We specialize in close-quarter drilling for aerospace, defense, cabinetry, model building and general industrial production.

Est. 1911 • Women-Owned Family Business

Our Drilling Attachments

Dependable precision tools in a variety of sizes and designs, up to 1/4-inch capacity, for all types of drilling problems.

Straight Flexible Attachments

Flexible drilling attachments that reach around obstructions in straight-run and awkward spaces. Custom lengths available.

Straight flexible specs »

45° Angle Attachments

Precision 45-degree angle drilling attachments for close-quarter and right-space drilling in tighter spots.

45° angle specs »

Right Angle Attachments

Right angle drilling attachments with rigid and flexible models for reaching into corners where other drills cannot.

Right angle specs »

Thin head and flat offset drilling attachments

Thin Head & Flat Offset

Ultra-thin head and flat offset designs for drilling close to a surface, perfect for tight fixtures and panels.

Thin head specs »

Adjustable Offset Attachments

Adjustable offset drilling attachments to align your drill precisely with the work, in rigid or flexible form.

Adjustable offset specs »

Parts & Accessories

Find the exact replacement part for your Terry Tool with our part finder chart, plus brass adapters, chucks and countersinks.

Parts finder » Accessories »

A Trusted Name Since 1911

Founded by Mr. Terry as the George A. Terry Co. in 1911, Terry Tools began by manufacturing dental instruments. In the 1930s an aircraft manufacturer asked us to build tougher versions — and Terry Tools became the original angle drilling attachments used in American aircraft production ever since.

Today our tools are used across aerospace, defense, and countless industries where there is a need to drill, countersink or deburr in close quarters.

Learn Our Story View History & Vintage Ads

Why Choose Terry Tools

American made: manufactured entirely in the USA with the highest-quality materials.
Alloy steel gears: custom gears, shafts and spindles heat-treated for maximum service.
Close-quarter specialists: drilling attachment designs perfected over 100 years.
Women-owned family business: personalized service and custom tooling support.
In-house repair: ready replacement parts and factory service.

Applications & Industries

Terry Tools are used to install, repair and manufacture across dozens of industries. Here are just a few:

Aerospace & Defense

Close-quarter drilling and countersinking in tight aircraft assembly spaces.

Cabinetry & Woodworking

Adjustable and angle drilling for corner joints and confined panel work.

Model Building

Small, precise flexible attachments ideal for model planes and fine work.

Machine Shop

Components for milling machines, machining centers, lathes and drill presses.

See Full Applications

Worth a Look

Not everything that lands on our bench is steel. A surprising share of our customers come from the fine-work world — model builders, instrument makers, watchmakers — and the questions they ask us overlap with the collecting side of those hobbies. If you build or service timepieces yourself, the clone watches you choose to work on matter as much as the tools you reach for: our customers in the trade keep the same short list of suppliers for exactly these pieces, and we see no reason to argue with their pick. (No affiliation — just a name we hear at the shop.)