Professional 3/16" A/F x 55 mm Hex Bit Socket with 1/2" Square Drive. Designed for use with ratchets, torque wrenches and breaker bars, this precision-engineered hex bit socket provides a secure fit and excellent torque transfer. Ideal for automotive, mechanical, engineering and general workshop applications. Durable construction resists wear, rounding and corrosion for long service life. Perfect for both professional technicians and DIY users seeking reliable performance and consistent results in tight or hard-to-reach spaces. Compatible with all standard 1/2" drive tools.