Proto J54128A 27 Piece Master Tool Set 3/4 1 in Drive

Product Description

The PROTO J54128A is a 27-piece master tool set built for 3/4 inch and 1 inch drive applications, supplied in a hard tool box for job-site organization and transport. The set covers a broad range of inch-measurement sockets and accessories, making it a practical choice for heavy-duty mechanical work in HVAC, industrial maintenance, and commercial service environments. Key components include 12-point and 6-point standard sockets, a pear-head ratchet, drive extensions, a breaker bar, tongue and groove pliers, and a slotted driver. The set ships as a single packaged unit and carries a lifetime warranty.

This set is intended for trade professionals who need a consolidated drive-tool assortment for large fastener work, equipment installation, and mechanical teardown. The combination of 3/4 inch and 1 inch drive tools addresses heavy-equipment fasteners commonly encountered in commercial HVAC systems, large pumps, compressors, and industrial machinery. The included toolbox keeps components organized and ready for field use or shop deployment. The set is sized and weighted for stationary or mobile service carts.

Key Features

• 27-piece assortment covering 3/4 inch and 1 inch drive sizes in a single set
• Includes 12-point standard sockets in both inch and metric sizes (1/2 inch through 15/16 inch; 12 through 21 MM)
• 10 inch pear-head ratchet and 15-3/4 inch breaker bar for high-torque applications
• Drive extensions and 10-3/16 inch tongue and groove pliers included
• Packaged in a hard tool box for organized storage and transport
• Lifetime warranty; inch measurement type; not tether capable

Compatibility

Designed as a general-purpose master tool set for trade professionals working with 3/4 inch and 1 inch drive fasteners in heavy-duty mechanical and industrial service applications.

Installation Notes

This tool set is intended for use by licensed mechanics, HVAC technicians, and industrial service professionals. Always confirm drive size compatibility before applying torque to avoid fastener or tool damage. Inspect sockets and ratchet mechanisms for wear or cracks before each use. Store tools in the provided box when not in use to prevent loss and protect tool surfaces.