WORKPRO Mini Curved Jaw Locking Pliers 4 Inch
- Material Type: Chromium-Vanadium Steel
- Handle Material: Alloy Steel
- Item Weight: 0.24 pounds
- Color: Sliver
Last refreshed Jun 25, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A capable small locking plier for light, occasional use and emergency kits, but it is not built to survive repeated heavy-duty automotive work.
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ASIN: B0C3LL4ZD7Model: W031423ARCategory: Vise Grips & Locking Pliers
Overview
The Workpro W031423AR is a 4-inch curved-jaw locking plier machined from chrome vanadium steel with a built-in wire cutter and one-handed release trigger, built for small clamping, twisting and pinching jobs rather than daily heavy-duty shop use.
This is the small end of the vise-grip family: a curved jaw sized for tight spots, hose clamps and emergency fixes rather than breaker-bar torque work. The adjustable screw sets clamping pressure before the trigger locks it in place, and a diamond-pattern handle keeps grip in wet or greasy conditions. Buyers mostly keep one in a glovebox or tool bag as a backup rather than a primary plier.
- 4-inch curved jaw with built-in wire cutter
- Chrome vanadium steel construction
- Adjustable clamping screw
- Diamond-pattern anti-slip handle
Who it's for
Suited to anyone who wants a compact locking plier for a tool kit, glovebox or light repair drawer, where its main job is pinching a line, holding a small part or standing in for a clamp in a pinch. Not a fit for automotive or shop techs who need a locking plier to hold under sustained torque or heavy pressure.
Pros and cons
- Compact size fits tool kits and gloveboxes
- One-handed trigger release is easy to use
- Handle grip stays comfortable when wet or greasy
- Good value for occasional light use
- Locking mechanism can release under pressure unexpectedly
- Chrome coating has flaked off with regular use
- Connecting rod broke within a week under heavy use
- Smaller than some buyers expect, easy to size wrong
Performance notes
The screw at the rear of the handle sets how wide the curved jaws open before the trigger locks them down, so pressure is dialed in once and released with a single squeeze of the lever. That release lever is also the point several buyers flagged: under load the jaws can pop open on their own instead of staying locked until the lever is pulled. For light pinching, twisting or holding jobs the mechanism is reported to work fine.
Specifications
| Brand | Workpro |
|---|---|
| Model | W031423AR |
| Dimensions & fit | |
| Item Weight | 0.24 pounds |
| Item Dimensions L X W | 4 × 1.5 inches |
| Construction & materials | |
| Material Type | Chromium-Vanadium Steel |
| Handle Material | Alloy Steel |
| Color | Sliver |
| Included components | |
| Unit Count | 1 |
| Included Components | 4" Curved Jaw Locking Pliers |
| Other details | |
| Grip Type | Ergonomic |
| Specific Uses For Product | Gripping, Twisting |
| Item Type Name | Curved Jaw Locking Pliers |
Closest rivals on specs
IRWIN Vise-Grip 1602L3 Long Nose Locking Pliers 4 in- Item Weight 0.24 vs 0.97 pounds (-75%)
Amazon Basics Locking Pliers Set 5-Piece- Item Weight 0.24 vs 3.77 pounds (-94%)
Locking Pliers Set with Needle Nose and C-Clamp- Item Weight 0.24 vs 4 pounds (-94%)
Frequently asked questions
What size is the Workpro W031423AR locking plier?
It is a 4-inch curved jaw model, smaller than full-size vise grips, so check the size before ordering if you need a larger tool.
Does the Workpro W031423AR come with a wire cutter?
Yes, the jaw includes a built-in wire cutter alongside the clamping function.
Will these locking pliers hold under heavy pressure?
Several found them fine for light pinching and twisting, but at least one buyer had the release lever cause the jaws to pop open under load, and another had the connecting rod break during automotive work.