Search “types of torque screwdriver” and you’ll run into three words over and over: preset, adjustable, and digital. Here’s the part that trips people up - preset and adjustable usually aren’t two different tools. They’re two ways of describing the same mechanical screwdriver: you preset the torque value before you start work, using the tool’s adjustable scale to choose exactly what that value is. Digital is the genuinely separate third option, replacing the mechanical scale with an electronic sensor and display. This guide walks through what each one actually does and where it earns its place on a bench.

Preset (Adjustable Mechanical) Torque Screwdrivers

A mechanical torque screwdriver uses a spring-loaded clutch that physically disengages - slips - the instant a fastener reaches the torque value you’ve set. There’s no display, no battery, nothing to charge. The value itself is set using a graduated scale on the tool body before you begin work - that’s the “preset” part - and Delta’s models mark that scale in increments as fine as 0.02 N·m, so you’re dialing in a precise value within the tool’s range, not just picking between fixed options.

This makes it the natural choice for repetitive, single-spec work: a production line running the same fastener torque hundreds of times a shift, a field technician who needs a tool that works with no charge cycle to worry about, or any bench where simplicity and durability matter more than a digital record of every turn. Set it once, and every operator gets the same result without needing to read a display or remember a number.

Delta’s preset/adjustable mechanical range covers 0.1–1.2 N·m, 0.4–2.6 N·m, and 1–6 N·m, all on a 1/4" drive.

Built for repeatable, single-spec work - Delta’s preset mechanical torque screwdrivers need no batteries and no calibration software, just set the scale and go.  Shop Mechanical Torque Screwdrivers →

Digital Torque Screwdrivers

A digital torque screwdriver swaps the mechanical clutch for an electronic sensor that measures torque as you apply it, displaying the reading on an LCD in your choice of units - N·m, in-lb, ft-lb, or kgf·cm. Most models offer both Track Mode, showing a live reading as you turn, and Peak Mode, which captures and holds the highest torque reached even after you release pressure.

That electronic measurement typically brings a tighter accuracy class too - commonly ±2% clockwise / ±3% counter-clockwise - and most digital models store torque data internally, which matters the moment your process needs a documented, auditable record rather than just a completed task.

This is where digital earns its place: benches running more than one torque spec, electronics and PCB assembly where documented precision is part of the job, and any QA process where you need to prove what torque was actually applied, not just report that the fastener is “done.”

Delta’s digital range covers 0.1–2 N·m, 0.2–4 N·m, 0.3–6 N·m, and 1–10 N·m, also on a 1/4" drive.

Need a documented torque record, not just a finished fastener? Delta’s digital torque screwdrivers log every reading, with Peak and Track modes built in.  Shop Digital Torque Screwdrivers →

Matching the Tool to the Work

Plenty of benches keep both types on hand, because they’re suited to different moments rather than competing for the same job:

• A single fastener spec, repeated all day - a preset mechanical screwdriver, dialed in once, keeps every operator consistent without anyone reading a display.
• Several different torque values on the same bench - a digital screwdriver lets you change the target electronically instead of swapping tools.
• A QA process that needs proof, not just a result - digital’s data logging is the only way to produce that record after the fact.
• A field or no-power environment - mechanical’s battery-free design keeps working regardless.

For a deeper look at what goes wrong when either type is misused or the wrong range is chosen, our Stop Damaging Components: Use the Right Torque Screwdriver post covers the failure modes in detail.

The Bottom Line

“Preset,” “adjustable,” and “digital” aren’t three products to choose between - they’re two real tools described in three ways. A mechanical torque screwdriver is preset via its adjustable scale before use; a digital one is set electronically and gives you a live, logged reading. Neither replaces the other - most well-equipped benches have both, reached for depending on the job in front of them.

Equipping a full bench with both types? Preset mechanical from 0.1–6 N·m, digital from 0.1–10 N·m - every model includes a bit set and calibration certificate.  Browse Torquing Tools →

Choose the Right Torque Screwdriver with Delta

From repetitive production work to precision assembly and documented QA processes, Delta offers torque screwdrivers designed for different application requirements. Choose mechanical models for dependable, battery-free torque control or digital models when you need electronic measurement, Peak and Track modes, and torque data recording. With multiple torque ranges and a 1/4" drive, Delta’s torque screwdriver range gives professionals the flexibility to select the right tool for consistent and controlled fastening.