Proto J5441-MA Hex Bit Socket Set 1/2 in Drive 10 Pc

Product Description

The PROTO J5441-MA is a 10-piece metric hex bit socket set built for 1/2 inch drive applications. It covers hex sizes from 6 mm through 19 mm, giving technicians a complete range for fastener work across mechanical, HVAC, plumbing, and electrical service tasks. The set is designed for professionals who need reliable torque transfer on hex fasteners without switching drive sizes mid-job. Each socket is machined to accept standard 1/2 inch drive ratchets and extensions. The set weighs 5.55 pounds, reflecting the solid steel construction expected from PROTO tooling. Technicians working in tight service schedules will find the full size range reduces the need for secondary tool kits.

This hex bit socket set is suited for residential and commercial service environments where metric hex fasteners are common. Typical applications include equipment installation, panel work, pump and motor service, and mechanical assembly. The 10 included sizes — 6 mm, 8 mm, 10 mm, 12 mm, 13 mm, 14 mm, 15 mm, 17 mm, 18 mm, and 19 mm — cover the majority of metric hex fastener sizes encountered in trade fieldwork. The set works with any standard 1/2 inch drive ratchet, breaker bar, or torque wrench already in a technician's kit.

Key Features

• 10-piece metric set covering 6 mm through 19 mm hex sizes
• 1/2 inch drive compatibility with standard ratchets, extensions, and torque wrenches
• Includes all critical mid-range sizes: 13 mm, 14 mm, 15 mm, 17 mm, and 19 mm
• Metric measurement type — no SAE sizes mixed in the set
• 5.55 pound set weight reflects heavy-duty steel construction

Compatibility

Designed for use with any standard 1/2 inch drive ratchet, torque wrench, or breaker bar. Fits metric hex fasteners from 6 mm through 19 mm as encountered across HVAC, plumbing, electrical, and general mechanical service applications.

Installation Notes

This set is intended for use by licensed trade professionals and experienced technicians. Before using hex bit sockets on equipment, de-energize electrical systems and shut off fluid or gas supply as applicable to the work area. Ensure the socket is fully seated on the fastener before applying torque to prevent rounding. Use a calibrated torque wrench where manufacturer specifications require controlled fastener torque.