The SQ Mach Key Kit from Double HH Manufacturing includes 50 precision-cut square keys, designed for secure and reliable mechanical connections. Each key is crafted from high-quality materials, ensuring durability and resistance to wear. The kit features various sizes to accommodate different applications, making it versatile for both industrial and DIY projects. These keys meet industry standards for performance and compatibility, making them an essential addition to any workshop or maintenance kit. Perfect for securing gears and pulleys, this kit is a must-have for professionals.