# CDI 2503MFRPH 1/2 in. Drive Comfort-Grip Adjustable Micrometer Torque Wrench (30-250 ft-lb / 47-332 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 CDI 2503MFRPH 1/2 in. Drive Comfort-Grip Adjustable Micrometer Torque Wrench (30-250 ft-lb / 47-332 Nm) (CDI Torque Products (Snap-on Industrial Brands)) 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 | CDI 2503MFRPH 1/2 in. Drive Comfort-Grip Adjustable Micrometer Torque Wrench (30-250 ft-lb / 47-332 Nm) | ACDelco ARM601-4 1/2 in. Digital Torque Wrench (14.8-147.5 ft-lb) |
| --- | --- | --- |
| US price | $159.74 | $114.99 |
| Brand | CDI Torque Products (Snap-on Industrial Brands) | ACDelco |
| Drive size (in) | 0.5 | 0.5 |
| Torque min ft (lb) | 30 | 14.8 |
| Torque max ft (lb) | 250 | 147.5 |
| Torque range (nm) | 47-332 Nm | — |
| Accuracy | ±4% CW / ±6% CCW (20-100% of full scale) | ±2% CW / ±3% CCW (20-100% of maximum torque) |
| Mechanism | click (micrometer-adjustable, comfort-grip handle) | digital/electronic |
| Overall length (in) | 24.4 | — |
| Ratchet tooth count | 30 | — |
| Calibration certificate | Included — each wrench individually serialized with a matching certificate of calibration traceable to N.I.S.T. | Included — ISO 6789 standards compliance with certificate of calibration |
| Weight (lb) | — | 3.9 |

## Key differences

- Torque min ft (lb): CDI 2503MFRPH 1/2 in. Drive Comfort-Grip Adjustable Micrometer Torque Wrench (30-250 ft-lb / 47-332 Nm) 30 vs ACDelco ARM601-4 1/2 in. Digital Torque Wrench (14.8-147.5 ft-lb) 14.8
- Torque max ft (lb): CDI 2503MFRPH 1/2 in. Drive Comfort-Grip Adjustable Micrometer Torque Wrench (30-250 ft-lb / 47-332 Nm) 250 vs ACDelco ARM601-4 1/2 in. Digital Torque Wrench (14.8-147.5 ft-lb) 147.5
- Accuracy: CDI 2503MFRPH 1/2 in. Drive Comfort-Grip Adjustable Micrometer Torque Wrench (30-250 ft-lb / 47-332 Nm) ±4% CW / ±6% CCW (20-100% of full 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)
- Mechanism: CDI 2503MFRPH 1/2 in. Drive Comfort-Grip Adjustable Micrometer Torque Wrench (30-250 ft-lb / 47-332 Nm) click (micrometer-adjustable, comfort-grip handle) vs ACDelco ARM601-4 1/2 in. Digital Torque Wrench (14.8-147.5 ft-lb) digital/electronic
- Calibration certificate: CDI 2503MFRPH 1/2 in. Drive Comfort-Grip Adjustable Micrometer Torque Wrench (30-250 ft-lb / 47-332 Nm) Included — each wrench individually serialized with a matching certificate of calibration traceable to N.I.S.T. 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

## Sources

- CDI 2503MFRPH 1/2 in. Drive Comfort-Grip Adjustable Micrometer Torque Wrench (30-250 ft-lb / 47-332 Nm): https://www.partssource.com/parts/snap-on-incorporated/2503mfrph (partssource.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/cdi-2503mfrph-vs-acdelco-arm601-4/
Cite: Per The Front Desk Review, CDI 2503MFRPH 1/2 in. Drive Comfort-Grip Adjustable Micrometer Torque Wrench (30-250 ft-lb / 47-332 Nm) ($159.74) 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/cdi-2503mfrph-vs-acdelco-arm601-4/
License: CC BY 4.0.