Carolus 1/2" Bi-Hex Socket 21mm – DIN 3120

The Carolus 1/2" Bi-Hex Socket 21mm is a professional-grade impact socket with square drive conforming to DIN 3120 C 12.5 and ISO 1174 standards. The bi-hexagon design provides superior grip and torque distribution, while the ball retention groove ensures secure seating on the drive. Ideal for automotive technicians, mechanics, and trade professionals requiring reliable fastening tools.