Grey Pneumatic 1121M Drive x Standard Impact Socket - 3/8 21mm 12-Point

The Grey Pneumatic 1121M is a professional-grade 3/8" drive x 21mm standard length impact socket featuring a 12-point design for enhanced fastener access. Engineered with Grey Pneumatic's signature thin-wall construction, this impact socket provides superior access to tight spaces while maintaining exceptional strength and durability.

Key Features:

• 12-point standard length impact socket design
• Constructed from premium chrome-molybdenum alloy steel for maximum durability
• Heat treated to ensure long-lasting strength and resistance to wear
• Hard-stamped size markings for permanent identification that won't wear off
• Black oxide finish provides excellent corrosion and rust resistance
• Thin-wall design allows access to confined spaces while reducing weight
• Broader fastener contact area reduces rounding and stripping of fasteners
• Allows up to 20% more torque application compared to standard impact sockets

Grey Pneumatic impact sockets are designed to grip fasteners across a wider contact area, distributing force more evenly and protecting both the socket and the fastener. The optimized wall thickness provides the perfect balance between strength and accessibility, making this socket ideal for professional mechanics and serious DIY enthusiasts working with metric fasteners.