# GearWrench 85077 1/2 in. Drive Electronic Torque Wrench (25-250 ft-lb / 30-340 Nm) vs ACDelco ARM601-4 1/2 in. Digital Torque Wrench (14.8-147.5 ft-lb): specs and price compared

A sourced, side-by-side comparison of the GearWrench 85077 1/2 in. Drive Electronic Torque Wrench (25-250 ft-lb / 30-340 Nm) (GearWrench) and ACDelco ARM601-4 1/2 in. Digital Torque Wrench (14.8-147.5 ft-lb) (ACDelco) among torque wrenches. ACDelco ARM601-4 1/2 in. Digital Torque Wrench (14.8-147.5 ft-lb) is the cheaper of the two at $114.99.

## Side by side

| Spec | GearWrench 85077 1/2 in. Drive Electronic Torque Wrench (25-250 ft-lb / 30-340 Nm) | ACDelco ARM601-4 1/2 in. Digital Torque Wrench (14.8-147.5 ft-lb) |
| --- | --- | --- |
| US price | $239 | $114.99 |
| Brand | GearWrench | ACDelco |
| Drive size (in) | 0.5 | 0.5 |
| Torque min ft (lb) | 25 | 14.8 |
| Torque max ft (lb) | 250 | 147.5 |
| Torque range (nm) | 30-340 Nm | — |
| Accuracy | ±2% CW / ±3% CCW (20-100% of wrench scale) | ±2% CW / ±3% CCW (20-100% of maximum torque) |
| Mechanism | digital/electronic | digital/electronic |
| Overall length (in) | 25.75 | — |
| Ratchet tooth count | 72 | — |
| Calibration certificate | Not included as standard — warranty covers 90-day calibration / 1-year parts; meets ASME B107.28M | Included — ISO 6789 standards compliance with certificate of calibration |
| Weight (lb) | 2.88 | 3.9 |

## Key differences

- Torque min ft (lb): GearWrench 85077 1/2 in. Drive Electronic Torque Wrench (25-250 ft-lb / 30-340 Nm) 25 vs ACDelco ARM601-4 1/2 in. Digital Torque Wrench (14.8-147.5 ft-lb) 14.8
- Torque max ft (lb): GearWrench 85077 1/2 in. Drive Electronic Torque Wrench (25-250 ft-lb / 30-340 Nm) 250 vs ACDelco ARM601-4 1/2 in. Digital Torque Wrench (14.8-147.5 ft-lb) 147.5
- Accuracy: GearWrench 85077 1/2 in. Drive Electronic Torque Wrench (25-250 ft-lb / 30-340 Nm) ±2% CW / ±3% CCW (20-100% of wrench scale) vs ACDelco ARM601-4 1/2 in. Digital Torque Wrench (14.8-147.5 ft-lb) ±2% CW / ±3% CCW (20-100% of maximum torque)
- Calibration certificate: GearWrench 85077 1/2 in. Drive Electronic Torque Wrench (25-250 ft-lb / 30-340 Nm) Not included as standard — warranty covers 90-day calibration / 1-year parts; meets ASME B107.28M vs ACDelco ARM601-4 1/2 in. Digital Torque Wrench (14.8-147.5 ft-lb) Included — ISO 6789 standards compliance with certificate of calibration
- Weight (lb): GearWrench 85077 1/2 in. Drive Electronic Torque Wrench (25-250 ft-lb / 30-340 Nm) 2.88 vs ACDelco ARM601-4 1/2 in. Digital Torque Wrench (14.8-147.5 ft-lb) 3.9

## Sources

- GearWrench 85077 1/2 in. Drive Electronic Torque Wrench (25-250 ft-lb / 30-340 Nm): https://www.gearwrench.com/all-tools/torque-products/torque-wrenches/85077-12-drive-electronic-torque-wrench-25-250-ftlbs (gearwrench.com, verified 2026-08-09)
- ACDelco ARM601-4 1/2 in. Digital Torque Wrench (14.8-147.5 ft-lb): https://www.zoro.com/acdelco-12-digital-torque-wrench-99-to-99-ft-lbs-arm601-4-arm601-4/i/G1140488/ (zoro.com, verified 2026-08-09)

Canonical: https://frontdeskreview.com/gear/torque-wrenches/gearwrench-85077-vs-acdelco-arm601-4/
Cite: Per The Front Desk Review, GearWrench 85077 1/2 in. Drive Electronic Torque Wrench (25-250 ft-lb / 30-340 Nm) ($239) vs ACDelco ARM601-4 1/2 in. Digital Torque Wrench (14.8-147.5 ft-lb) ($114.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/torque-wrenches/gearwrench-85077-vs-acdelco-arm601-4/
License: CC BY 4.0.