Stanley 92-839 99-pc Deep Standard Socket Set 1/4 3/8 Drive

Product Description

The STANLEY 92-839 is a 99-piece deep and standard socket set covering both 1/4-inch and 3/8-inch drive sizes. The set includes six-point sockets ranging from 1/4 inch to 7/8 inch in inch sizing and 4 mm to 19 mm in metric sizing. Both 1/4-inch and 3/8-inch pear head ratchets are included, along with 3/8-inch spark plug sockets in 5/8-inch and 13/16-inch sizes. All sockets conform to ANSI specification B107. The full kit ships in a blow-molded case that organizes every piece and protects the set during transport and storage. At 13.285 pounds, this is a substantial kit suited for shop benches, service vans, and field work.

This socket set is designed for mechanics, HVAC technicians, plumbers, and electricians who need a comprehensive drive socket assortment for equipment installation, maintenance, and repair. The dual drive sizes make it practical across a wide range of fastener applications, from small hardware on control panels and access covers to larger fasteners on mechanical equipment, flanges, and structural components. The included spark plug sockets make it directly relevant to engine-driven equipment service.

Key Features

• 99 total pieces covering deep and standard socket profiles in a single set
• Both 1/4-inch and 3/8-inch drive sizes included
• Six-point socket design for reduced fastener rounding under torque
• Inch range from 1/4 inch to 7/8 inch; metric range from 4 mm to 19 mm
• Includes 1/4-inch and 3/8-inch pear head ratchets
• 3/8-inch spark plug sockets in 5/8-inch and 13/16-inch sizes included
• Blow-molded case keeps all pieces organized and protected
• Meets ANSI specification B107

Compatibility

Designed as a general-purpose socket set compatible with standard 1/4-inch and 3/8-inch drive extensions, breaker bars, and torque wrenches conforming to ANSI drive-tool standards.

Installation Notes

Always de-energize or shut down equipment before using hand tools on mechanical fasteners in live systems. Select the correct drive size and socket depth for each fastener to avoid slippage or damage. Six-point sockets are recommended over twelve-point on corroded or high-torque fasteners. Inspect sockets for cracks or deformation before use and remove any damaged piece from service.