Proto J7440R8MM Hex Bit Socket Set 1/4 in Drive 8 Pc

Product Description

The PROTO J7440R8MM is an 8-piece metric hex bit socket set built for 1/4 inch drive tools. Each socket features a chrome finish and is sized to cover the most common metric hex fasteners found in HVAC equipment, electrical enclosures, plumbing fixtures, and light commercial equipment. The set spans 1.5 mm through 7 mm and mounts on a rail for organized storage and quick access. Overall length per socket is 2-3/4 inches. This set is suited for technicians who need a compact, metric-specific hex bit solution that works with standard 1/4 inch drive ratchets and extensions.

This set is used across a wide range of trade applications where metric hex fasteners are common, including HVAC equipment panels, pump assemblies, electrical control boxes, and pool equipment housings. The eight included sizes — 1.5 mm, 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, and 7 mm — cover the range most frequently encountered in residential and light commercial service work. The rail storage keeps sockets organized and prevents loss on the job.

Key Features

• 8-piece metric hex bit socket set covering 1.5 mm to 7 mm
• 1/4 inch drive compatible with standard ratchets and extensions
• Chrome finish for corrosion resistance and durability
• 2-3/4 inch overall length per socket
• Rail-mount container for organized storage and fast retrieval
• Individual sizes: 1.5 mm, 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm

Compatibility

Designed for use with standard 1/4 inch drive ratchets, torque wrenches, and extensions. Fits metric hex fasteners across residential and light commercial equipment service applications.

Installation Notes

This set is used by HVAC technicians, plumbers, electricians, and pool service professionals for fastener removal and installation on equipment and panels. Always de-energize or lock out equipment before removing fastener hardware on electrical or mechanical assemblies. Select the correct hex size before applying torque to avoid fastener rounding.