Proto J55202A 28 Pc 3/4 in Drive Metric Socket Set

Product Description

The PROTO J55202A is a 28-piece standard socket set built for heavy-duty trade and industrial use. It runs on a 3/4 inch drive and covers a metric range from 21 mm through 60 mm, making it suited for large fastener work found in mechanical, HVAC, and industrial equipment service. All sockets feature a 12-point design and a chrome finish. The set ships in a heavy-duty case and includes six drive accessories: two extensions, a hinge handle, a pear head ratchet, a sliding T-handle, and a universal joint. The complete set weighs 64.43 pounds. PROTO backs this set with a lifetime warranty.

This set is intended for professional mechanics, millwrights, pipefitters, and HVAC service technicians working on large commercial or industrial equipment where standard 3/4 inch drive tooling is required. The wide socket range — 21 mm, 22 mm through 30 mm, 32 mm, 35 mm, 36 mm, 38 mm, 41 mm, 42 mm, 46 mm, 50 mm, 54 mm, 55 mm, 58 mm, and 60 mm — covers the fastener sizes commonly encountered on chillers, large air handlers, industrial pumps, and structural connections.

Key Features

• 28-piece metric set with 3/4 inch drive, covering 21 mm to 60 mm socket sizes
• 12-point socket geometry for engagement on standard hex fasteners
• Chrome finish provides corrosion resistance for shop and field use
• Includes pear head ratchet, sliding T-handle (20 inch), hinge handle (20 inch), universal joint, 4 inch extension, and 8 inch extension
• Heavy-duty set box keeps components organized and protected during transport
• Lifetime warranty from PROTO

Compatibility

Designed as a standard 3/4 inch drive metric socket set suitable for use with any 3/4 inch drive ratchets, breaker bars, torque wrenches, or impact tools that accept 3/4 inch drive square-drive accessories.

Installation Notes

This set is intended for use by qualified tradespeople working on commercial, industrial, or heavy mechanical applications. Always verify that the socket size is fully seated on the fastener before applying torque to avoid rounding. Confirm equipment is de-energized, depressurized, or otherwise made safe before beginning fastener work. Store sockets in the provided case to prevent loss and protect the chrome finish.