Irwin 4052ZR Replacement Locking Plier Spring 5-pack

Product Description

The IRWIN 4052ZR is a replacement spring designed to restore full locking function to Vise-Grip locking pliers. The spring provides the tension that allows the plier jaw to lock onto a workpiece and release cleanly. When the original spring fatigues, bends, or snaps, the tool loses its ability to hold proper jaw pressure. Replacing the spring returns the plier to factory performance without requiring a full tool replacement. Each package contains 5 springs. At 0.02 pounds per pack, this is a lightweight but essential service part for any technician or tradesperson who relies on Vise-Grip locking pliers in daily work.

This replacement spring fits several standard Vise-Grip locking plier models used across HVAC, plumbing, electrical, and general mechanical trades. It is commonly kept on hand in service vehicles and shop benches as a low-cost consumable. The spring is suited to any environment where locking pliers see heavy or repetitive use, which accelerates spring wear. Buying in a 5-pack reduces downtime when multiple tools need service at once or when stocking for a crew.

Key Features

• Restores locking jaw tension on worn or broken Vise-Grip locking pliers
• Compatible with multiple Vise-Grip locking plier models including 5WR, 6LN, 6BN, 6R, and 6SP
• Sold in a 5-pack for efficient stocking and multi-tool servicing
• Lightweight at 0.02 pounds per pack — easy to carry in a service bag or toolbox
• OEM-style replacement part for like-for-like performance restoration

Compatibility

Replacement spring for Vise-Grip 5WR, 6LN, 6BN, 6R, and 6SP locking pliers.

Installation Notes

Spring replacement on locking pliers requires no special tools and is performed by hand. Remove the worn or broken spring from the plier pivot area before seating the new spring. Ensure the spring is fully seated at both contact points before testing jaw function. No fasteners, adhesives, or lubricants are typically needed for this service.