Grey Pneumatic 4139M Drive x Standard Impact Socket - 1 39mm 12-Point

The Grey Pneumatic 4139M is a professional-grade 1-inch drive, 39mm, 12-point standard length impact socket engineered for the extreme torque demands of pneumatic and electric impact wrenches. Built from chrome molybdenum steel with thorough heat treatment, this socket delivers the precise balance of strength and toughness required for heavy-duty industrial, fleet, and construction applications.

Key Features:

• 1" drive for use with high-torque pneumatic, hydraulic, and electric impact tools
• 39mm socket opening fits metric fasteners on heavy equipment, trucks, and buses
• 12-point configuration provides a 30-degree ratcheting arc and easier fastener engagement in confined spaces
• Standard length profile balances reach and structural rigidity for everyday impact use
• Chrome molybdenum (Cr-Mo) steel construction with through-hardening for superior impact resistance and long service life
• Radius corner design engages fastener flats rather than corners, significantly reducing the risk of rounding bolts and nuts
• Stealth Black oxide finish provides corrosion resistance and reduces surface wear
• Dual laser-etched and roll-stamped size markings for fast, reliable identification in the field
• Individually packaged in a poly bag with barcode for convenient inventory tracking

Grey Pneumatic impact sockets are a trusted choice for professional technicians in heavy equipment maintenance, truck and bus service, industrial manufacturing, and construction equipment repair. The 4139M is sold individually and is compatible with all standard 1-inch drive impact tools.