3/8 Inch 12 Point Deep Impact Socket 21mm - Grey Pneumatic

The Grey Pneumatic 1121MD 3/8 Inch 12 Point Deep Impact Socket, 21mm, is engineered for professional automotive and industrial technicians who require robust tools for demanding tasks. This deep impact socket delivers extended reach and secure engagement on stubborn 21mm fasteners, ensuring reliable performance in high-torque applications. Constructed from durable, impact-grade steel, it is built to endure the rigorous output of pneumatic and cordless impact tools.

Key Features

• Extended Reach & Versatility: The 3/8" drive with a 21mm deep profile offers extended access for recessed fasteners and ensures compatibility with various impact wrenches, cordless tools, and ratchets.
• Secure Fastener Engagement: A 12-point design facilitates quick and positive indexing, enhancing grip and minimizing the risk of rounding on new or worn 21mm fasteners.
• Professional-Grade Durability: Constructed from heat-treated Chrome-Molybdenum alloy steel, this socket provides superior strength and resilience against the high-torque forces of professional impact tools. It features a black oxide coating for resistance against rust and corrosion.
• Precision Manufacturing: Produced to exact tolerances by Grey Pneumatic, this socket ensures a snug fit, reduced slippage, and dependable performance in demanding shop environments.
• High Torque Drive: Grey Pneumatic's "High Torque" drive design increases strength and allows for up to 20% more torque to be applied compared to standard hex impact sockets.

Applications

This 21mm deep impact socket is an essential tool for automotive and light truck repair, commonly used on many passenger cars and half-ton pickups. It is ideal for the removal and installation of lug nuts, strut and control arm hardware, subframe bolts, and various larger engine bay fasteners requiring a 21mm socket. This tool pairs effectively with 3/8" drive impact wrenches for wheel service, or with air ratchets and compact impacts for chassis and brake system work. Beyond automotive, it serves well in industrial maintenance, equipment assembly, and repair settings that regularly employ 21mm metric fasteners and demand impact-rated robustness.

Specifications

• Model: 1121MD
• Manufacturer: Grey Pneumatic
• Drive Size: 3/8 inch
• Socket Size: 21mm
• Style: 12 Point Deep Impact
• Dimensions: 2.5" x 1" x 1"
• Weight: 0.41 lbs