ACDelco ARM601-4
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Summary
4.3 stars across 5,000+ reviews. Popular as a budget digital option. The LCD screen and buzzer alert make it easy to use. +/-2% accuracy is the tightest in this roundup. The 4-99 ft-lbs range is good for smaller fasteners but too limited for lug nuts on most vehicles.
$30-$50 Amazon as of April 2026
Key Specifications
| type | Digital |
| torqueRange | 4-99 ft-lbs |
| driveSize | 1/2" |
| accuracy | +/-2% |
| direction | Bidirectional |
| calibration | Factory (send-in) |
Pros
- Best accuracy in this group at +/-2%.
- Digital readout eliminates scale-reading guesswork.
- Bidirectional measurement.
- Buzzer and LED alert at target.
- Very affordable for a digital wrench.
Cons
- 4-99 ft-lbs range is too narrow for lug nuts (typically 80-120 ft-lbs, right at the ceiling).
- Requires 2 AAA batteries.
- Plastic construction feels less durable.
- Send-in calibration adds turnaround time.