Apex Tools EX-371-4 4-Inch Extension with 7/16" Male Hex Drive and 3/8" Square Drive

The Apex Tools EX-371-4 is a 4-inch socket extension designed for professional mechanics and technicians who need to access fasteners in tight or recessed spaces. This extension features a 7/16" male hex drive on one end and a 3/8" square drive on the other, providing versatile connectivity between different drive sizes and tool types.

Key Features:

• 4-inch extension length provides additional reach for deep or recessed fasteners
• 7/16" male hex drive end for secure engagement with hex sockets and tools
• 3/8" square drive end compatible with standard 3/8" drive ratchets and tools
• Precision-machined construction ensures accurate fit and reduces wear
• Chrome finish provides corrosion resistance and easy cleaning
• Heat-treated steel construction for durability and long service life

This extension adapter is ideal for automotive repair, equipment maintenance, and general mechanical applications where standard socket reach is insufficient. The dual-drive design allows for seamless integration with mixed drive tool sets.