MCMASTER-CARR® 5544A8

• Tamper-Resistant Penta Design – Specifically made for five-sided security fasteners
• 3/8" Square Drive – Compatible with standard ratchets and torque wrenches
• Durable Construction – Designed for long-lasting performance in industrial settings
• Secure Grip & Torque Transfer – Ensures reliable operation with reduced stripping risk
• Ideal for Utility & Electrical Applications – Commonly used for access panels, transformers, and secured enclosures

The McMaster 5544A8 3/8" Square Drive Penta Socket is a specialty tamper-resistant socket designed for securing and removing pentagon-shaped fasteners commonly found on utility, electrical, and industrial equipment. Built for durability and precision, this socket ensures a secure grip and efficient torque transfer, making it ideal for maintenance and service applications. Compatible with standard 3/8" square drive ratchets and extensions, this high-strength tool is an essential addition to any professional's toolkit.