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The PROTO J47165 is a 65-piece deep and standard socket set designed for professional use in mechanical, HVAC, plumbing, and electrical service work. It covers both inch and metric sizing, with sockets ranging from 1/4 inch to 7/8 inch in inch sizes and 4 mm to 19 mm in metric. The set includes both 1/4 inch and 3/8 inch drive sizes, giving technicians the flexibility to work in tight spaces with the 1/4 inch drive or apply more torque with the 3/8 inch drive. All sockets carry a polished steel finish and the set ships in a cardboard box. PROTO backs this set with a lifetime warranty.
This socket set suits professional tradespeople across HVAC, plumbing, and electrical disciplines who need a comprehensive hand tool kit on service calls or at the bench. The combination of deep and standard profiles makes it practical for reaching recessed fasteners on equipment enclosures, electrical panels, and mechanical assemblies. The dual inch and metric coverage reduces the need to carry separate sets when working on both domestic and imported equipment.
Designed as a general-purpose socket set compatible with standard 1/4 inch and 3/8 inch drive ratchets, extensions, and accessories.
Always de-energize electrical equipment and follow applicable NEC or local codes before using hand tools on or near live panels. When servicing mechanical or HVAC equipment, shut off power and follow lockout/tagout procedures before accessing fasteners. Use the correct drive size and socket depth for the fastener to avoid rounding or slipping. Inspect sockets for cracks or wear before each use and do not use damaged sockets.
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