Proto J74218 Metric Deep Socket Set 5 Pc 1/2 in Drive

Product Description

The PROTO J74218 is a five-piece metric deep socket set built for professional trade use in HVAC, plumbing, electrical, and general mechanical service work. Each socket features a 6-point design that grips fastener flats firmly, reducing rounding on corroded or over-torqued hardware. The set covers a 1/2 inch drive and spans five common metric sizes from 17 mm through 24 mm. Sockets are manufactured from steel and backed by a lifetime warranty, making this set a reliable addition to a service van or shop toolbox. The deep profile accommodates fasteners on long studs, recessed bolts, and threaded rod common in mechanical and plumbing installations.

This socket set is suited for residential and light commercial service applications where metric fasteners are standard. Typical uses include equipment mounting hardware, pump and motor assemblies, pipe flanges, and electrical panel or disconnect enclosure hardware. The 1/2 inch drive pairs with standard ratchets, breaker bars, and torque wrenches common in trade shops. The five included sizes cover the fastener range frequently encountered on HVAC equipment, hydronics components, and electrical service gear that uses metric hardware.

Key Features

• 6-point socket geometry reduces fastener rounding during removal
• Deep profile fits long studs, recessed bolts, and threaded rod
• Metric sizing: 17 mm, 19 mm, 21 mm, 22 mm, and 24 mm included
• 1/2 inch drive compatible with standard ratchets, extensions, and torque wrenches
• Steel construction for durability in field and shop environments
• Lifetime warranty coverage

Compatibility

Designed as a general-purpose 1/2 inch drive metric deep socket set for use with standard 1/2 inch drive ratchets, breaker bars, and torque wrenches across trade and mechanical service applications.

Installation Notes

This set is appropriate for use by HVAC technicians, plumbers, electricians, and mechanical service professionals. Always de-energize and lock out electrical equipment before loosening or tightening fasteners near live components. Ensure the socket is fully seated on the fastener before applying torque to prevent slippage or rounding. Inspect sockets for cracks or wear before each use and replace damaged tools in accordance with your shop safety standards.